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	<id>https://en.banglapedia.org/index.php?action=history&amp;feed=atom&amp;title=Fine-grained_Mica</id>
	<title>Fine-grained Mica - Revision history</title>
	<link rel="self" type="application/atom+xml" href="https://en.banglapedia.org/index.php?action=history&amp;feed=atom&amp;title=Fine-grained_Mica"/>
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	<updated>2026-05-31T22:44:54Z</updated>
	<subtitle>Revision history for this page on the wiki</subtitle>
	<generator>MediaWiki 1.40.0</generator>
	<entry>
		<id>https://en.banglapedia.org/index.php?title=Fine-grained_Mica&amp;diff=12976&amp;oldid=prev</id>
		<title>Mukbil at 15:03, 25 August 2021</title>
		<link rel="alternate" type="text/html" href="https://en.banglapedia.org/index.php?title=Fine-grained_Mica&amp;diff=12976&amp;oldid=prev"/>
		<updated>2021-08-25T15:03:05Z</updated>

		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;table style=&quot;background-color: #fff; color: #202122;&quot; data-mw=&quot;interface&quot;&gt;
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				&lt;col class=&quot;diff-marker&quot; /&gt;
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				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;Revision as of 15:03, 25 August 2021&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l1&quot;&gt;Line 1:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 1:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;−&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&#039;&#039;&#039;Fine-grained Mica&#039;&#039;&#039;  weatherable minerals in the [[Soil|soil]]s of Bangladesh include [[Sand|sand]] and [[Silt|silt]] particles of [[Feldspar|feldspar]]s, micas (both black and white), dark coloured ferromagnesian minerals, and 2:1 lattice [[Clay|clay]]s. Fine-grained mica includes fine sandy and silty deposits of recent [[Alluvium|alluvium]] in [[Bangladesh Soil|bangladesh soil]]s. Its dimension varies from 0.25 to 0.002 mm. Fine-grained Mica (muscovite and biotite) occurs abundantly in alluvial deposits derived from the Brahmaputra, Ganges and Tista river systems. But [[Sediment|sediment]]s derived from northern and eastern hills are generally less micaceous (especially in the case of biotite). [[Madhupur Clay|madhupur clay]] also contains much less mica. Deposits from the rivers [[Tista River|tista]], the [[Brahmaputra|brahmaputra]], and the [[Ganges River|ganges]] are different from those derived from hills and Terrace areas. The former deposits usually contain 5-30 percent micas. Its amount varies with size fraction, some silty deposits containing as much as 80 percent micas in associated sand fraction.  &lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&#039;&#039;&#039;Fine-grained Mica&#039;&#039;&#039;  weatherable minerals in the [[Soil|soil]]s of Bangladesh include [[Sand|sand]] and [[Silt|silt]] particles of [[Feldspar|feldspar]]s, micas (both black and white), dark coloured ferromagnesian minerals, and 2:1 lattice [[Clay|clay]]s. Fine-grained mica includes fine sandy and silty deposits of recent [[Alluvium|alluvium]] in [[Bangladesh Soil|bangladesh soil]]s. Its dimension varies from 0.25 to 0.002 mm. Fine-grained Mica (muscovite and biotite) occurs abundantly in alluvial deposits derived from the Brahmaputra, Ganges and Tista river systems. But [[Sediment|sediment]]s derived from northern and eastern hills are generally less micaceous (especially in the case of biotite). [[Madhupur Clay|madhupur clay]] also contains much less mica. Deposits from the rivers [[Tista River|tista]], the [[Brahmaputra &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;River&lt;/ins&gt;|brahmaputra]], and the [[Ganges River|ganges]] are different from those derived from hills and Terrace areas. The former deposits usually contain 5-30 percent micas. Its amount varies with size fraction, some silty deposits containing as much as 80 percent micas in associated sand fraction.  &lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br/&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br/&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;The non-capillary porosity of poorly drained soils is caused by flakes of mica along with other factors. Micas are associated with gleyans in [[Floodplain|floodplain]]s where mica flakes are oriented parallel to the surface of coating. But on the homogenisation of floodplain soils, mica flakes are arranged in an irregular fashion. New alluviums are generally stratified in Bangladesh. The individual layers may be thin or thick. In uniform silty and clayey deposits, the stratification is mainly caused by thin layers of mica-flakes, which have been deposited with their flat surfaces parallel to the surface of the deposit. [Md Mizanur Rahman Bhuiyan]&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;The non-capillary porosity of poorly drained soils is caused by flakes of mica along with other factors. Micas are associated with gleyans in [[Floodplain|floodplain]]s where mica flakes are oriented parallel to the surface of coating. But on the homogenisation of floodplain soils, mica flakes are arranged in an irregular fashion. New alluviums are generally stratified in Bangladesh. The individual layers may be thin or thick. In uniform silty and clayey deposits, the stratification is mainly caused by thin layers of mica-flakes, which have been deposited with their flat surfaces parallel to the surface of the deposit. [Md Mizanur Rahman Bhuiyan]&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br/&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br/&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[bn:মিহি-দানাদার অভ্র]]&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[bn:মিহি-দানাদার অভ্র]]&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Mukbil</name></author>
	</entry>
	<entry>
		<id>https://en.banglapedia.org/index.php?title=Fine-grained_Mica&amp;diff=12975&amp;oldid=prev</id>
		<title>Mukbil at 15:02, 25 August 2021</title>
		<link rel="alternate" type="text/html" href="https://en.banglapedia.org/index.php?title=Fine-grained_Mica&amp;diff=12975&amp;oldid=prev"/>
		<updated>2021-08-25T15:02:49Z</updated>

		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;table style=&quot;background-color: #fff; color: #202122;&quot; data-mw=&quot;interface&quot;&gt;
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				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;Revision as of 15:02, 25 August 2021&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l1&quot;&gt;Line 1:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 1:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;−&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&#039;&#039;&#039;Fine-grained Mica&#039;&#039;&#039; weatherable minerals in the [[soil]]s of Bangladesh include [[sand]] and [[silt]] particles of [[feldspar]]s, micas (both black and white), dark coloured ferromagnesian minerals, and 2:1 lattice [[clay]]s. Fine-grained mica includes fine sandy and silty deposits of recent [[alluvium]] in [[bangladesh soil]]s. Its dimension varies from 0.25 to 0.002 mm. Fine-grained Mica (muscovite and biotite) occurs abundantly in alluvial deposits derived from the Brahmaputra, Ganges and Tista river systems. But [[sediment]]s derived from northern and eastern hills are generally less micaceous (especially in the case of biotite). [[madhupur clay]] also contains much less mica. Deposits from the rivers [[tista]], the [[brahmaputra]], and the [[ganges]] are different from those derived from hills and Terrace areas. The former deposits usually contain 5-30 percent micas. Its amount varies with size fraction, some silty deposits containing as much as 80 percent micas in associated sand fraction.  &lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&#039;&#039;&#039;Fine-grained Mica&#039;&#039;&#039; &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt; &lt;/ins&gt;weatherable minerals in the [[&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;Soil|&lt;/ins&gt;soil]]s of Bangladesh include [[&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;Sand|&lt;/ins&gt;sand]] and [[&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;Silt|&lt;/ins&gt;silt]] particles of [[&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;Feldspar|&lt;/ins&gt;feldspar]]s, micas (both black and white), dark coloured ferromagnesian minerals, and 2:1 lattice [[&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;Clay|&lt;/ins&gt;clay]]s. Fine-grained mica includes fine sandy and silty deposits of recent [[&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;Alluvium|&lt;/ins&gt;alluvium]] in [[&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;Bangladesh Soil|&lt;/ins&gt;bangladesh soil]]s. Its dimension varies from 0.25 to 0.002 mm. Fine-grained Mica (muscovite and biotite) occurs abundantly in alluvial deposits derived from the Brahmaputra, Ganges and Tista river systems. But [[&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;Sediment|&lt;/ins&gt;sediment]]s derived from northern and eastern hills are generally less micaceous (especially in the case of biotite). [[&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;Madhupur Clay|&lt;/ins&gt;madhupur clay]] also contains much less mica. Deposits from the rivers [[&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;Tista River|&lt;/ins&gt;tista]], the [[&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;Brahmaputra|&lt;/ins&gt;brahmaputra]], and the [[&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;Ganges River|&lt;/ins&gt;ganges]] are different from those derived from hills and Terrace areas. The former deposits usually contain 5-30 percent micas. Its amount varies with size fraction, some silty deposits containing as much as 80 percent micas in associated sand fraction.  &lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br/&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br/&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;−&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt; &lt;/del&gt;The non-capillary porosity of poorly drained soils is caused by flakes of mica along with other factors. Micas are associated with gleyans in [[floodplain]]s where mica flakes are oriented parallel to the surface of coating. But on the homogenisation of floodplain soils, mica flakes are arranged in an irregular fashion. New alluviums are generally stratified in Bangladesh. The individual layers may be thin or thick. In uniform silty and clayey deposits, the stratification is mainly caused by thin layers of mica-flakes, which have been deposited with their flat surfaces parallel to the surface of the deposit. [Md Mizanur Rahman Bhuiyan&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;] [Bhuiyan, Md Mizanur Rahman  Department of Soil Science, Khulna University&lt;/del&gt;]&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;The non-capillary porosity of poorly drained soils is caused by flakes of mica along with other factors. Micas are associated with gleyans in [[&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;Floodplain|&lt;/ins&gt;floodplain]]s where mica flakes are oriented parallel to the surface of coating. But on the homogenisation of floodplain soils, mica flakes are arranged in an irregular fashion. New alluviums are generally stratified in Bangladesh. The individual layers may be thin or thick. In uniform silty and clayey deposits, the stratification is mainly caused by thin layers of mica-flakes, which have been deposited with their flat surfaces parallel to the surface of the deposit. [Md Mizanur Rahman Bhuiyan]&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br/&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br/&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[bn:মিহি-দানাদার অভ্র]]&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[bn:মিহি-দানাদার অভ্র]]&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Mukbil</name></author>
	</entry>
	<entry>
		<id>https://en.banglapedia.org/index.php?title=Fine-grained_Mica&amp;diff=11023&amp;oldid=prev</id>
		<title>Nasirkhan: Content Updated.</title>
		<link rel="alternate" type="text/html" href="https://en.banglapedia.org/index.php?title=Fine-grained_Mica&amp;diff=11023&amp;oldid=prev"/>
		<updated>2021-06-18T06:00:11Z</updated>

		<summary type="html">&lt;p&gt;Content Updated.&lt;/p&gt;
&lt;table style=&quot;background-color: #fff; color: #202122;&quot; data-mw=&quot;interface&quot;&gt;
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				&lt;tr class=&quot;diff-title&quot; lang=&quot;en&quot;&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;Revision as of 06:00, 18 June 2021&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l1&quot;&gt;Line 1:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 1:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;−&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;&amp;lt;p class=Normal &amp;gt;&lt;/del&gt;&#039;&#039;&#039;Fine-grained Mica&#039;&#039;&#039; weatherable minerals in the [[soil]]s of Bangladesh include [[sand]] and [[silt]] particles of [[feldspar]]s, micas (both black and white), dark coloured ferromagnesian minerals, and 2:1 lattice [[clay]]s. Fine-grained mica includes fine sandy and silty deposits of recent [[alluvium]] in [[bangladesh soil]]s. Its dimension varies from 0.25 to 0.002 mm. Fine-grained Mica (muscovite and biotite) occurs abundantly in alluvial deposits derived from the Brahmaputra, Ganges and Tista river systems. But [[sediment]]s derived from northern and eastern hills are generally less micaceous (especially in the case of biotite). [[madhupur clay]] also contains much less mica. Deposits from the rivers [[tista]], the [[brahmaputra]], and the [[ganges]] are different from those derived from hills and Terrace areas. The former deposits usually contain 5-30 percent micas. Its amount varies with size fraction, some silty deposits containing as much as 80 percent micas in associated sand fraction.  &lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&#039;&#039;&#039;Fine-grained Mica&#039;&#039;&#039; weatherable minerals in the [[soil]]s of Bangladesh include [[sand]] and [[silt]] particles of [[feldspar]]s, micas (both black and white), dark coloured ferromagnesian minerals, and 2:1 lattice [[clay]]s. Fine-grained mica includes fine sandy and silty deposits of recent [[alluvium]] in [[bangladesh soil]]s. Its dimension varies from 0.25 to 0.002 mm. Fine-grained Mica (muscovite and biotite) occurs abundantly in alluvial deposits derived from the Brahmaputra, Ganges and Tista river systems. But [[sediment]]s derived from northern and eastern hills are generally less micaceous (especially in the case of biotite). [[madhupur clay]] also contains much less mica. Deposits from the rivers [[tista]], the [[brahmaputra]], and the [[ganges]] are different from those derived from hills and Terrace areas. The former deposits usually contain 5-30 percent micas. Its amount varies with size fraction, some silty deposits containing as much as 80 percent micas in associated sand fraction.  &lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br/&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br/&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;−&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;  &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;&amp;lt;p class=Normal &amp;gt;&lt;/del&gt;The non-capillary porosity of poorly drained soils is caused by flakes of mica along with other factors. Micas are associated with gleyans in [[floodplain]]s where mica flakes are oriented parallel to the surface of coating. But on the homogenisation of floodplain soils, mica flakes are arranged in an irregular fashion. New alluviums are generally stratified in Bangladesh. The individual layers may be thin or thick. In uniform silty and clayey deposits, the stratification is mainly caused by thin layers of mica-flakes, which have been deposited with their flat surfaces parallel to the surface of the deposit. [Md Mizanur Rahman Bhuiyan] [Bhuiyan, Md Mizanur Rahman  Department of Soil Science, Khulna University]&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;  The non-capillary porosity of poorly drained soils is caused by flakes of mica along with other factors. Micas are associated with gleyans in [[floodplain]]s where mica flakes are oriented parallel to the surface of coating. But on the homogenisation of floodplain soils, mica flakes are arranged in an irregular fashion. New alluviums are generally stratified in Bangladesh. The individual layers may be thin or thick. In uniform silty and clayey deposits, the stratification is mainly caused by thin layers of mica-flakes, which have been deposited with their flat surfaces parallel to the surface of the deposit. [Md Mizanur Rahman Bhuiyan] [Bhuiyan, Md Mizanur Rahman  Department of Soil Science, Khulna University]&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br/&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br/&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[bn:মিহি-দানাদার অভ্র]]&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[bn:মিহি-দানাদার অভ্র]]&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Nasirkhan</name></author>
	</entry>
	<entry>
		<id>https://en.banglapedia.org/index.php?title=Fine-grained_Mica&amp;diff=2264&amp;oldid=prev</id>
		<title>0:0:0:0:0:0:0:1: Content Updated.</title>
		<link rel="alternate" type="text/html" href="https://en.banglapedia.org/index.php?title=Fine-grained_Mica&amp;diff=2264&amp;oldid=prev"/>
		<updated>2021-06-17T19:10:05Z</updated>

		<summary type="html">&lt;p&gt;Content Updated.&lt;/p&gt;
&lt;p&gt;&lt;b&gt;New page&lt;/b&gt;&lt;/p&gt;&lt;div&gt;&amp;lt;p class=Normal &amp;gt;&amp;#039;&amp;#039;&amp;#039;Fine-grained Mica&amp;#039;&amp;#039;&amp;#039; weatherable minerals in the [[soil]]s of Bangladesh include [[sand]] and [[silt]] particles of [[feldspar]]s, micas (both black and white), dark coloured ferromagnesian minerals, and 2:1 lattice [[clay]]s. Fine-grained mica includes fine sandy and silty deposits of recent [[alluvium]] in [[bangladesh soil]]s. Its dimension varies from 0.25 to 0.002 mm. Fine-grained Mica (muscovite and biotite) occurs abundantly in alluvial deposits derived from the Brahmaputra, Ganges and Tista river systems. But [[sediment]]s derived from northern and eastern hills are generally less micaceous (especially in the case of biotite). [[madhupur clay]] also contains much less mica. Deposits from the rivers [[tista]], the [[brahmaputra]], and the [[ganges]] are different from those derived from hills and Terrace areas. The former deposits usually contain 5-30 percent micas. Its amount varies with size fraction, some silty deposits containing as much as 80 percent micas in associated sand fraction. &lt;br /&gt;
&lt;br /&gt;
 &amp;lt;p class=Normal &amp;gt;The non-capillary porosity of poorly drained soils is caused by flakes of mica along with other factors. Micas are associated with gleyans in [[floodplain]]s where mica flakes are oriented parallel to the surface of coating. But on the homogenisation of floodplain soils, mica flakes are arranged in an irregular fashion. New alluviums are generally stratified in Bangladesh. The individual layers may be thin or thick. In uniform silty and clayey deposits, the stratification is mainly caused by thin layers of mica-flakes, which have been deposited with their flat surfaces parallel to the surface of the deposit. [Md Mizanur Rahman Bhuiyan] [Bhuiyan, Md Mizanur Rahman  Department of Soil Science, Khulna University]&lt;br /&gt;
&lt;br /&gt;
[[bn:মিহি-দানাদার অভ্র]]&lt;/div&gt;</summary>
		<author><name>0:0:0:0:0:0:0:1</name></author>
	</entry>
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