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Definition
Felsic
Light colored
coasrse grained
Intrusive Igneous rock. |
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felsic
light colored
fine grained
extrusive igneous rock |
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intermediate
gray to salt and pepper
coarse grained
igneous |
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intermediate
gray/ salt pepper
fine grained
intrusive igneous rock |
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mafic
dark color
coarse grained
igneous |
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mafic
dark colored
fine grained |
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clastic
large angular grains in fine matrix, lots of feldspar |
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clastic
large rounded grains in fine matrix, lots of feldspar
poor sorting |
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Definition
mostly quarts
round to sub round grains
well sorted |
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| quartz and feldspar, reddish color, sub round to angular grains, sandy looking, moderately poor sorting |
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| poorly-moderately poor sorting sub round to angular contains a variety of rock fragments |
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| quartz, feldspar, rock fragments and clay, angular to sub angular grains, poorly sorted |
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| mud, clay, silt, well sorted, no grainsize <.06mm, very small. |
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| clean crystaline reacts with HCl |
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| fossils and fossil imprints in crystalline matrix reacts to HCl |
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| poorly cemented shell fragments reacts to HCl looks like oatmeal/granola |
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| dense microcrystalline quartz mild reaction to HCl |
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