Chemistry Flashcards

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+ward’ssciencewardsci.com800-962-2660 Anorthosite Type: Igneous; intrusive. Texture/Appearance: Medium to coarse-grained, equigranular with elongated tabular plagioclase. Color: Dark gray to bluish-gray, sometimes lighter shades. Mineralogy/Chemis...

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+ward’ssciencewardsci.com800-962-2660 Metaconglomerate Type: Metamorphic, regional. Texture/Appearance: Coarse-grained rock containing rounded to subangular clasts greater than 2mm in diameter and distributed in a fine-grained matrix or metamorphi...

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+ward’ssciencewardsci.com800-962-2660 Quartzite Type: Metamorphic; regional. Texture/Appearance: Massive, with generally small grain size; sometimes saccharoidal. Grain size (sand size, 1/16-2mm) dependent on original detritus. Generally non-folia...

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+ward’ssciencewardsci.com800-962-2660 Andesite Type: Igneous; extrusive. Texture/Appearance: Generally fine-grained, aphanitic. Massive structure, often porphyritic with phenocrysts standing out in a vitreous or fine-grained groundmass. Color: Dar...

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wardsci.com 800-962-2660 Anthracite Type: Metamorphic; regional. Texture/Appearance: Homogeneous, shiny, hard, scaly and compact. Subconchoidal fractures; glassy looking. Color: Dark brown to black, lustrous. Mineralogy/Chemistry: 92%–98% fixed ca...

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wardsci.com 800-962-2660 Peridotite Type: Igneous; intrusive. Texture/Appearance: Medium to coarse-grained; massive, granular, sometimes porphyritic. Color: Medium gray to greenish-gray. Mineralogy/Chemistry: Ultramafic, with mafic minerals greate...

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+ward’ssciencewardsci.com800-962-2660 Phyllite Type: Metamorphic, regional. Texture/Appearance: Very fine-grained showing strong schistosity; commonly displaying crenulated (wavy) cleavage. Generally coarser than slate. Cleavage surface exhibits a...

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wardsci.com 800-962-2660 Scoria Type: Igneous; extrusive (volcanic). Texture/Appearance: Fine-grained to glassy; highly vesicular (>50%). Usually heavier and more crystalline than pumice. Color: Dark reddish-brown to black. Mineralogy/Chemistry: B...

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+ward’ssciencewardsci.com800-962-2660 Shale Type: Sedimentary; clastic. Texture/Appearance: Very fine-grained (clay to silt-sized particles) grains not distinguishable to the naked eye. A relatively soft rock with fine laminae; may display carbona...

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wardsci.com 800-962-2660 Slate Type: Metamorphic; regional. Texture/Appearance: Fine-grained; lacks mineral segregation banding, displays rock cleavage in one direction. Surface may appear somewhat smooth and shiny. Color: Various, including dark ...

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ward’s sciencewardsci.com800-962-2660 Gabbro Type: Igneous; intrusive. Texture/Appearance: Granular; medium-grained. Color: Dark, medium gray, green-gray or brownish-gray. Mineralogy/Chemistry: Mafic; with essential plagioclase (50%-75%) and pyrox...

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+ward’ssciencewardsci.com800-962-2660 Pumice Type: Igneous; extrusive (pyroclastic). Texture/Appearance: Glassy, vesicular, foamy, frothy. Very light-weight with numerous vacuoles (some varieties float in water). A natural glass froth in which the...

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+ward’ssciencewardsci.com800-962-2660 Sandstone Type: Sedimentary; clastic. Texture/Appearance: Grains generally sand-sized (1/16–2mm), normally sorted and somewhat rounded. May be poorly to well cemented. May also display visible fossils (not par...

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