Answer:
C .radioactive dating each year
Explanation:
In determining the absolute age of two rocks, the most important thing is the radioactive dating of the rocks to compare the radioactive isotopes within them.
Absolute dating involves ascribing numerical age to a rock body. It is usually done by the process of radioactive dating in which the number of daughter to parent isotopes are compared.
This helps to give a precise numerical age to a rock.
- The other choices are for relative dating.
A. tien shan mountains
im not sure but i hope it’s right =]
The seismic focus is the point in the earth's crust where an earthquake originates from.
Answer:
Warm, humid climate near the Equator
Explanation:
- For the formation of the coal deposits the presence of the swampy vegetation and the needs a lot of moisture content and a plenty of warm temperatures for them to thrive. These conditions would have been near the today equator.
Incoming solar radiation is almost double at the equator then at the poles, causing the water closer to the equator to be warmer. The heat difference also causes the oceans to swirl so the water that is around the equator will eventually end up at the poles and keep circulating around.