September 5, 1793 - July 27, 1794
Answer:
a. plants are preserved as fossils
Explanation:
Through the passing of time, the dead bodies like plants or animals rest in soil, and the cover by different particles, with the time they can be compressed and form a soil layer. If the environment condition changes they get caught in one soil layer. If this process is repeated constantly, so a new soil layer will be formed. So passing the time, different soil layers will have different animals or plants. With the help of isotopes, the scientist can determine the years of each layer.
Answer:
Infrequent but highly explosive
Explanation:
At a subduction zone, the descending plate carries with it sediments containing water and carbon dioxide.
These substances are trapped as fluids at high pressure in the rising magma.
When they reach atmospheric pressure at the surface, they become gases that expand suddenly and explosively.