Using the table below, which lists the rate of deposition for various types of s
ID: 152906 • Letter: U
Question
Using the table below, which lists the rate of deposition for various types of sediment, calculate how long it would take to make a deposit of 1 ½ meter thick of biogenous ooze? How about a 1 ½ meter thick deposit of abyssal clay? Show your calculations.
Type of sediment/deposit Avg. rate of deposition (per 1000 years) Thickness of deposit after 1000 years equivalent to... Coarse lithogenous sediment, neritic deposit 1 meter (3.3 feet) A meter stick Biogenous ooze, pelagic deposit 1 centimeter (0.4 inch) The diameter of a dime Abyssal clay, pelagic deposit 1 millimeter (0.04 inch) The thickness of a dime Manganese nodule, pelagic deposit 0.001 millimeter (0.00004 inch) A microscopic dust particleExplanation / Answer
Average rate of deposition of biogenous ooze (given) = 1 cm per 1000 years
thickness of the biogenous ooze = 1.5 meters = 150 cm
Time required to form a deposit of biogenous ooze which is 1.5 m thick = 150 x 1000 = 150,000 years
Average rate of deposition of abyssal clay (given) = 1 mm per 1000 years
thickness of the biogenous ooze = 1.5 meters = 1500 mm
Time required to form a deposit of abyssal clay which is 1.5 m thick = 1500 x 1000 = 1,500,000 years
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