conservation.ca.gov

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Definitions (222)

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dense


a. Compact, fine-grained, lacking pore space. b. Rock or mineral with a high specific gravity.
Source: conservation.ca.gov

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term


Definition
Source: conservation.ca.gov

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a


acicular:
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adamantine


A brilliant luster like that of a diamond.
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aggregate


a. A mass of rock particles, grains of minerals, or both. b. Irregular mass of crystals. c. Sand, gravel, crushed stone or rock that forms the major part of concrete.
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alkaline


Containing sodium and/or potassium in excess of the amount needed to form feldspar with the available silica. An alkaline rock, for example, contains more than average amounts of potassium- and sodium-bearing minerals.
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amorphous


Without form; applied to rocks and minerals which have no definite external crystalline structure.
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amphibole


A mineral group that consists of common, dark-colored, rock-forming silicate minerals. The most common minerals are hornblende, tremolite, and actinolite.
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andesite


A volcanic rock composed essentially of the mineral andesine and one or more of the mafic minerals.
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anhedral


Refers to a crystal with no well-formed external faces.
Source: conservation.ca.gov


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