Author Question: What kind of information can marine microfossils not provide? a. Temperature variations in the ... (Read 61 times)

ap345 · **on:** Aug 22, 2018

What kind of information can marine microfossils not provide?
a. Temperature variations in the surface and deep water.
b. Patterns in ocean circulation
c. The orientation of the magnetic poles based on trace metals found within the shells
d. Productivity of the marine biosphere and upwelling

Question 2

What organism is likely to be found in siliceous ooze?
a. Foraminifera
b. Coccolithophore
c. Radiolarian
d. Pteropod

al · **Reply #1 on:** Aug 22, 2018

Answer to Question 1

ANS: C
Data about temperature variations, patterns in ocean circulation, and the productivity of the marine
biosphere and upwelling can be collected by analyzing the stable isotopes of oxygen and variations in
carbon isotopes. Also, the presence of trace metals, found within the carbonate shells of these
microfossils, can provide information on the ocean and atmosphere of the past. Information can be
found in the section Sediments Are Historical Records of Ocean Processes.

Answer to Question 2

ANS: C
Siliceous ooze persists at deeper depths than calcareous ooze. This ooze contains radiolarian and
diatoms. Radiolarians are glassy, amoeba-like organisms. Information can be found in the section
Pelagic Sediments Vary in Composition and Thickness