Quiz#1 - environment? (1 pt.) a. moderately b. well c....

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Geol 1602 Name___________________ Quiz 1 9/12/05 1. A siliciclastic sedimentary rock composed of a wide range of grain sizes, such as silts, sands, and gravels would be considered (1pt.) a. very well-sorted  b. a subarkosic litharenite  c. subangular to subrounded  d. poorly to moderately sorted  e. all of the above  2. You are given two rocks: (1) a quartz-pebble conglomerate & (2) a siltstone . (2 pts.) (a) Which of these two rocks would have been deposited closest to the source of terrigenous clastic sediments?____________ (b) Explain your answer above in terms of the hydrodynamic conditions required to deposit each sedimentary rock. (e.g. which required more energetic fluid flow vs. calmer fluid flow?) 3. Which of the following textural properties are used to describe clastic rocks --there are three so you may circle more than one. (1 pt.) a. textural nonconformity  b. specific density  c. roundness  d. sorting  e. specific gravity  f. grain size 
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4. What type of sorting would best characterize a sandstone that was formed in a desert sand dune
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Unformatted text preview: environment? (1 pt.) a. moderately b. well c. poorly d. none of the above 5 . Carbonate rocks (which were once reefs and surrounding lagoons) are deposited today in what types of environments? (e.g. high, temperate, or tropical latitudes)--(1 pt.) Name one location where carbonates are currently being produced. (1 pt.) 6. Which of the following terms cannot be used as descriptors of rock names. (1pt.) a. ferrugineous b. fossiliferous c. arkose d. petroliferous e. none of them above can be used 7. A mature quartz sandstone without large scale cross-lamination would most likely have been deposited in what type of environment? (1pt.) a. beach b. alluvial fan c. submarine fan d. none of the above 8. An immature coarse greywacke would most likely have been deposited in what type of environment? (1pt.) a. beach b. continental shelf c. deep abyssal plain d. all of the above...
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Quiz#1 - environment? (1 pt.) a. moderately b. well c....

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