Badlands trip Flashcards
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A carbonaceous zone, mainly lignite and/or lignite shale, that marks moste of the contact between the Bullion Creek and Sentinel Butte Formations.
HT Butte Formation
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Comprised of gray to brown siltstone, claystone, sandstone, and lignite that was deposited in river, lake, and samp environments.
Sentinal Butte formation
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A soft, plastic, porous, light-colored rock composed essentially of clay minerals. It’s color ranges from white to light green and light blue when fresh, becoming light cream on exposure and gradually changing to yellow, red, or brown. The rock is greasy and soaplike to the touch (without gritty feeling), and commonly has the ability to absorb large quantities of water accompanied by an increase in volue of about 8 times.
bentonite
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A brownish-black coal that is intermediate in coalifiction between peat and subbituminous coal. Also known as brown coal.
lignite
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A term used for fine-grained siliceous rocks with a texture and a fracture resembling those of unglazed porcelain.
porcelanite
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Local terminology to describe “clinker.”
Sediment that has been baked to a degree by heat from buried, burning coal (lignite). May range from rock that has completely melted, to material with a glassy texture, to brick, to slightly colored and hardened material.
scoria
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common juniper
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ground juniper
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western snowberry
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golden currant
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skunk bush
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green ash
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cottonwood
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chokecherry
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buffalo berry
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yellow warbler
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rufous sided towhee
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common flicker
