Table 2: Stratigraphic Section and Your Interpretation of the Environments of De
ID: 289664 • Letter: T
Question
Table 2: Stratigraphic Section and Your Interpretation of the Environments of Deposition Read the description of each rock unit and interpret in what environment each unit formed. Write the first letter of the appropriate environment in the left column of this table. Possible environments of deposition include: (R) reef, (L) lagoon that is shallow and muddy, (B) beach, (D) delta that is sandy, (W) wetland and swamp that is muddy and plant-rich, and (N) narrow sea with very saline water and with a limited connection with the ocean. Upper Shale Upper Shale: Tan, dark gray, and dark brown shale with nonmarine fish Carbon beds: reddish and gray sedimentary beds with coal near the base Tan Mountain Sandstone: tan, locally cross-bedded sandstone with both Muddy Shale: light-gray shale that contains few beds or fractures. Lower Sandstone: porous, well-sorted sandstone with very little natural Lower Limestone: dark gray limestone with abundant marine fossils; fossils, dark layers emit an oily smell. Carbon Beds Tan Mtn. Sandstone marine fossils and land plants. Base contains thick beds of coal Muddy Shale Lower Sandstone cement between the grains; locally oil stained Lower Limestone contains many open fractures and bedding planes, some of which are locally oil stained Salt -2 Salt: a mostly cream-colored to light gray salt with some thin organic-rich ~ shales. Tests show that the salt, shale, and overlying limestone have all been heated to 80 to 100°C.Explanation / Answer
Upper Shale: W - Wetland and swamp that is muddy and plant-rich
Carbon beds: Swamp
Tan Mountain Sandstone: Delta
Muddy Shale: Lake
Lower sandstone: Beach
Lower Limestone: Reef
Salt: shallow restricted circulation in arid hot climate
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