GEOL 1301 - Lab 04 - Sedimentary Rocks

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1301

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Geology

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Apr 3, 2024

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GEOL 1301 Lab 04 Sedimentary Rocks Observe and record the properties of the sedimentary rock samples listed in the first table and use them to identify the samples. Lists of properties can be found below, as well as links to rock identification keys. Please complete both attached worksheets, then upload your completed lab on Canvas. Grain Size: Gravel > 2 mm Sand 0.06-2 mm Silt 0.004-0.06 mm Clay < 0.004 mm Rounding: Angular Sub-rounded Well-rounded Sorting: Poorly sorted Well-sorted Composition: Can you identify any minerals in the rock? Other Observations: Layering Fissility Color … Identification Keys: http://geology.about.com/od/rocks/a/Rock-Tables.htm http://jersey.uoregon.edu/~mstrick/MinRockID/RockID/Sedimentary.html
Examining and Classifying Sedimentary Rocks Use the following link to identify the sedimentary rock samples listed in the table: http://profharwood.x10host.com/GEOL101/Labs/Sediment/index.htm Sample Number Grain Size Rounding Sorting Composition Other Observations Rock Name 1 No grain size Angular Well sorted Calcite Hardness = 3, Non- Reactive to HCL Limestone 3 No grain size Sub-rounded Well sorted Gypsum Hardness = 2, Non- Reactive to HCL Rock Gypsum 8 >2 mm Sub-rounded Poorly sorted Rounded quartz, feldspar and rock fragments Non-Reactive to HCL Conglomerate 9 No grain size Sub-rounded Well sorted Silica(quartz) Hardness = 7, Non- Reactive to HCL Chert 10 1/16 – 2mm Sub-rounded Well sorted Quartz, feldspar Non-reactive to HCL Sandstone 12 No grain size Angular Well sorted densely compacted organic material and plant fragments Non-reactive to HCL Bituminous Coal
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