Sedimentary Rock Lab

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Jackson Community College *

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Course

109

Subject

Geology

Date

Jan 9, 2024

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docx

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3

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Fall 2023 GEL 109 Name: Lab: SEDIMENTARY ROCK ANSWER SHEET I. Identifying the Detrital Sedimentary Rocks SR Samples Color Grain Size Name 23 White/ Brown 2MM Conglomerate 24 Pink Gray 1MM to 2MM Sandstone 25 Pink, Brown and white 1MM Arkose 26 gray 0.002 Shale 27 Grey and white 0.062 oil shale 30 gray , red and brown 2.1 or Breccia SR samples Composition (main mineral and sediment shape- rounded or angular) 23 Rounded, sedimentary and sand clay 24 angular , quartz and feldspar 25 Angular, feldspar granite 26 Angular, clay particles 27 Rounded, sedimentary, clay and rock 30 Angular, feldspar, quartz II. Identifying the Chemical Sedimentary Rocks A. 1. Name two samples from Table 3 that show bubbling or fizzing with vinegar. It may be much easier to listen for the sound of the effervescence rather than seeing the bubbles. Malachite and Calcareous 2. What mineral does this tell you the two samples contain? Calcium carbonate Table 3 SR samples color composition Rock name
28 Red and brown Magnesium calcite Calcareous 29 Grey and white Calcite dolomite Limestone 31 White Calcium sulfate Gypsum 32 Green and gray Copper carbonate Malachite 33 Pink and gray Calcium magnesium Dolomite Fall 2023 GEL 109 2. Chalk is classified as a chemical sedimentary rock. Look up information on chalk to describe why it would be classified as a chemical sedimentary rock. Do not simply attach a long definition of chalk. Write one or two sentences in your own words that describe how chalk forms, and how this fits the definition of a chemical sedimentary rock. Chalk includes chemical calcium which is found in the chemical sedimentary rocks. Which is made up of small particles that are bonded together. 3. Oolite is classified as a chemical sedimentary rock. Look up information on oolite to describe why it would be classified as a chemical sedimentary rock. Do not simply attach a long definition of oolite. Write one or two sentences in your own words that describe how oolite forms, and how this fits the definition of a chemical sedimentary rock. Oolite is classified because they are bonded together. Also it is formed when the waves push against it and create erosion.
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