Top answers

Explain how pillow lavas are formed and describe how they can be used as a way up structure

Pillow lavas are formed when lava is emitted from the earths crust under water. The outer layer cools rapidly and hardens while the inside remains soft. A round pillow like ball of malleable rock is formed a...
JM
Answered by James M. • Geology tutor
3360 Views

What are some hypotheses to explain the Permo-Triassic mass extinction? (when 95% of marine invertebrates and 77% of land species became extinct)

A mass extinction is a large decrease in the number of species over a relatively short period of time (several millions of years). The most likely cause of this species decline is the formation of the superc...
SJ
1893 Views

Why does the Hjulstrom curve have its shape

As grains get larger, they require more energy from the transport medium to erode away.Larger grains are deposited at higher energies than smaller grains because they require an even greater amount of energy...
FB
Answered by Felix B. • Geology tutor
2459 Views

Explain how Paleomagnetism can be used as evidence for Continental Drift?

When hot magma rises towards the surface and cools, iron particles, inside the cooling rock, align themselves with the earth's polarity at the time of cooling. Due to magnetic reversals, that change the orie...
RD
Answered by Ruby D. • Geology tutor
10119 Views

“The formation of economic deposits of hydrocarbons and coals solely results from the thermal alteration of organic material” Evaluate this statement with reference to geological processes.

The thermal history of a sedimentary basin, where hydrocarbons and coals form, plays a crucial role in controlling the formation of economic deposits of hydrocarbons and coals. For hydrocarbon deposits, the ...
Answered by • Geology tutor
1875 Views