Geology 1 laboratory, Sedimentary Rocks Name
Use the supplied “Sedimentary Rocks Supplemental Information” sheet and webpage/videos linked below to answer the questions in this lab.
Informational/Lab Webpage: http://profharwood.x10host.com/GEOL101/Labs/Sediment/index.htm
Sedimentary Rock Identification Video: https://www.youtube.com/watch?v=U3eR19ZfBqE&t=247s
Supplemental Information Sheet: Supplied on Canvas!!
define the following terms in your own words:
Sedimentary Rock:
Clastic/Detrital Sedimentary Rocks:
Chemical Sedimentary Rocks:
Organic Sedimentary Rocks:
Sedimentary Rock Texture:
Sedimentary Rock Composition:
Depositional Environment:
Complete the table below by listing the appropriate sediment type and corresponding rock name for each row. The table on the bottom of Page 2 of your “Supplemental Information Packet” provided on Canvas. The first row is completed for you.
Size Sediment Type Rock Name
Boulders Rudite, conglomerate, breccia
Complete the following table by evaluating the provided description/definition AND comparing that information to the materials listed in the “Supplemental Information Packet” provided on Canvas.
To complete this table: 1) identify the sedimentary rock type (i.e. detrital, organic chemical, inorganic chemical, or organic)
2) specifying the sedimentary rock name,
3) providing a picture of that rock collected from available images (e.g. via online resources, pictures from your personal collection, etc.), and
4) providing an example of a type of environment where that rock may have formed (e.g. the beach, deep ocean, a river, etc.). The first is done for you:
Sedimentary Rock Type Description/Definition Rock Name Rock Picture Depositional Environment
1. DETRITAL Clasts are too small to see, softer than glass, no fizz in acid, made of extremely fine particles, very smooth feel CLAYSTONE Deep Ocean
2. Contains the remains of living organisms. Fizzes in hydrochloric acid. Made of broken shell fragments.
3. Large (>2mm diameter) clasts, angular in shape
4. Composed of the shells of diatoms, white powder, does NOT fizz in acid
5.Clasts large enough to see, but still small (<2mm diameter)
6. Banded, won’t fizz in acid, scratches glass, formed by silica precipitating in from hot water
7. Made of the mineral halite. Clear/white, won’t fizz in acid
8. Made of CaCO3 that precipitated directly from water. Very fine-grained carbonate/limestone mud
9. Clasts are too small to see, softer than glass, no fizz in acid, particles large enough to see, gritty feel
10. Made of CaCO3 that precipitated directly from water. Interlocking limestone crystals WITHOUT fossils
Sedimentary Rock Type Description/Definition Rock Name Rock Picture Depositional Environment
11. Contains the remains of living organisms. Fizzes in hydrochloric acid. White powdery rock.
12. Softer than your fingernail, won’t fizz in acid
13. Soft, brown organic matter
14. Made of CaCO3 that precipitated directly from water. Layered, crystalline appearance.
15. Contains the remains of living organisms. Fizzes in hydrochloric acid. Interlocking limestone crystals with animal/plant fossils.
16. Solid black organic matter
17. Contains the remains of living organisms. Fizzes in hydrochloric acid. Sand-sized balls of calcite.
18. Made of CaCO3 that precipitated directly from water. Blobs of calcium carbonate found in soil
19. Clasts are too small to see, softer than glass, no fizz in acid, splits into flat layers, silt or clay mixture
20. Contains the remains of living organisms. Fizzes in hydrochloric acid. Gravel or larger pieces of carbonate/limestone
21. Made of CaCO3 that precipitated directly from water. Sand-sized balls.
22. Composed of Radiolarians, scratches glass
23. Large, rounded and smoothed clasts
24. Made of CaCO3 that precipitated directly from water. Gravel or larger clasts of carbonate/limestone
Visit the interactive Lab Webpage linked here:
http://profharwood.x10host.com/GEOL101/Labs/Sediment/index.htm
To complete this exercise, select the proper texture, grain size, composition, approximate hardness (use the “hardness test” icons below the image, use n/a if the software tells you that the hardness cannot be determined for a specific sample(s)), identify whether the sample fizzes in acid (use the “Hydrochloric Acid Test” icon to see if the samples fizzes in acid), rock name, and a copy of the pictures provided for each sample.
Provide those correct answers in the table below:
Texture Grain Size Composition Approximate Hardness Fizz in Acid (Yes or no?) Rock Name Rock Picture
1. Chemical No Grain Size Calcite 3.5 Yes Limestone
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