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Texas A&M Geology 101
Sedimentary Rock Samples
15
Geology
Undergraduate 1
02/15/2010

Additional Geology Flashcards

 


 

Cards

Term
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Definition

#1 Calcarenite/ Fossiliferous Limestone / Skeletal Limestone

Reacts with HCL
Composed of sand size grains, feels rough
Some larger shells may be seen

Term
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Definition
Sedimentary Rocks

#5 Breccia

Consists of large, angular grains
Term
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Definition
#4 Chert

Microcrystalline variety of quartz, so it scratches glass
May exhibit conchoidal fracture
Term
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Definition

#3 Quartz Sandstone

Sand size grains, feels rough
Made up of mostly quartz, will scratch class
Tends to look fairly homogeneous

Term
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Definition

#2 Bituminous Coal

Black color, may be sooty or bright
May show layering

Term
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Definition

Sedimentary Rocks

#7 Conglomerate

Consists of large, rounded grains

Term
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Definition
#6 Micrite / Micritic Limestone

Reacts with HCL
No visible grains
Term
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Definition
#10 Rock Salt

Salty Taste
Visible Crystals
Brittle
Term
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Definition

#9 Hematitic Sandstone

Sand sized grains, so it feels rough
Brown/rust color due to the hematite present

 

Term
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Definition
#8 Coquina

Reacts with HCL
Made up of large, gravel sized shell or coral fragments
Term
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Definition
#12 Mudstone

Mudstone used as a general term for all detrital rocks made up of mud sized particles.

Smooth, may appear to split into layers (shale) or crumble into blocks (claystone)
Term
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Definition

#11 Oolitic Limestone

Reacts with HCL
Comprised of spherical grains that resemble small pearls, called ooids

Term
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Definition

Sedimentary Rocks

#13 Chalk

Reacts with HCL
Very soft
Has distinct white color

Term
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Definition
#15 Arkose

Sand sized grains, so it feels rough
Contains grains of feldspar (pink grains)
Term
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Definition
#14 Lignite

Dull, dark brown, brittle rock.
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