Oxygen isotope ratios in calcite shells are used to indicate:
a. depth of ocean where animals lived.
b. distribution of droughts.
c. global climate.
d. sunlight penetration of ocean.
Answer: C
Oxygen isotope ratios in calcite shells are used to indicate:
a. depth of ocean where animals lived.
b. distribution of droughts.
c. global climate.
d. sunlight penetration of ocean.
Answer: C