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23 Cards in this Set
- Front
- Back
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Anything larger than 2mm in diameter
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Coarse
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From 2mm down to what can be made out with a 10x hand lens.
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Medium
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Too small to make out with hand lens
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Fine
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Anthing greater than 2mm in diameter
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Gravel
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Smaller than 2mm and greater than 1/16 mm.
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mud
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Most common detrital minerals are..........?
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quartz, microcrystalline quartz, and potassium feldspar.
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What is mechanically produce sediment that may be lithified into_________? It is derived from pre-existing solid rock or mineral fragments and are classified on the basis of grain size.
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Detrital
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Name the most common sedimentary minerals.
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calcite/dolomite, kaolinite, halite, gypsum, hematite, limonite, potassium feldspar, quartz
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This term describes a rock composed of grains too small to see with the unaided eye. Therefore, the observer can't tell whether the rock is clastic or interlocking.
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Microscopic texture
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Chemically or biochemically produced minerals are commonly......?
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calcite, quartz, halite, gypsum, hematite, and limonite
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It is used to describe grains in a clastic rock. Having edges that are sharp and unworn. Be sure to look at grains that have not been broken in preparing the specimen shows that the grains haven't been carried far(if at all) from their source.
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Angular
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A sedimentary rock formed by the activity of organisms which cause minerals to be precipitated from solution.
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Biochemical Sedimentary Rocks
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What material holds the grains together in a clastic rock?
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Cement
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What sedimentary rock is formed by physical and chemical processes which cause mnerals to be precipitated from solution?
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Chemical Sedimentary Rock
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This term describes a rock composed of broken fragments of minerals, rocks, or organic remains.
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Clastic Texture
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What is opposite of friable does not crumble.
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Compact
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What is certain minerals and rocks fracture producing a repeated circular or accuate pattern.
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Conchoidal Fracture
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What gives off bubbles. In lab, the bubbles will be of carbon dioxide formed by the reaction of dilute hydrochloric acid with a carbonate mneral(calcite or dolomite).
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Effervesces
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What texture is made of inter locking grains that grew together from solution. No cement necessary; the intergrown edges hold grains together. Looks like a phaneritic igneous rock, but made of sedimentary minerals.
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Crystalline
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It can be split into thin sheets along layering.
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Fissile
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Any identifiable remains of the past life. Any sedimentary rock can have them.
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Fossil
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Any of the constituent particles of a sedimentary rock. In clastic rocks, grain specifically means the largest particles in the rock. Sometimes referred as clasts.
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Grain
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this texture (for sedimentary rocks) was described previously in the laboratory on igneous rocks. It will also be an important sedimentary rock texture. Mnerals like calcite, gypsum, halite, and microcrystallline quartz upon precipitation, produce______textures.
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Interlocking(Crystalline) Texture
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