chapter 4: GEOL 1550

Siliceous ooze most often forms...

beneath the calcite composition depth

You take a sediment sample from the ocean floor at a depth of 5500 m. The area has low biological productivity and the CCD is at 4500 m depth. Your sample will probably consist of __________.

clay

From smallest to largest, organize sediment particles in the correct order...

clay, silt, sand, pebbles

You add sand, silt, and clay to a jar of water, shake the jar vigorously, and allow the sediment to settle.The resulting sediment will most closely resemble that of a(n) __________.

continental rise

Evaporites such as salt and gypsum occur when...

evaporation exceeds rainfall

Calcareous sediments are unlikely to dissolve in water that is...

high temperature

Salt beds of the U.S. Gulf Coast are __________.

hydrogenous sediments

Cosmogenous sediments are...

mostly microscopic

Marine sediment with more than 30% biogenous material is called...

ooze

The most abundant mineral in lithogenous sediment is...

quartz

Lithogenous sediments are derived from...

rocks

Sediment samples from deep beneath the ocean floor are recovered by __________.

rotary drilling

Neritic sediments are most likely to be composed of __________.

sand, silt, and gravel

Oozes are uncommon on continental margins because __________.

the biogenous component tends to be overwhelmed by the amount of lithogenous material derived from the nearby continent

Hydrogenous sediments are derived from...

water chemistry

Sediments with all grains of about the same size are classified as...

well sorted

Ooze-type sediment would be more prevalent __ than __

K, F (green liquid than that falling into water)