Columbia River n Basalts Yellowstone National Park to A OREGON Use your knowledg
ID: 113591 • Letter: C
Question
Columbia River n Basalts Yellowstone National Park to A OREGON Use your knowledge about how basalt provinces form to place the following events in sequence from oldest to youngest Rank the events from oldest to youngest Hints Reset Help A large mantle plume begins to rise from deep within the Earth. The eruptions begin to wane as the plume head is emptied Magma finds its way to the surface via fissures, causing an initial massive extrusion of flood basalts. The mantle plume head undergoes decompression melting generating a large volume of magma. Oldest Youngest Submit My Answers Give UpExplanation / Answer
The sequence is as follows
From old to young
First the mantle plume head undergoes decompression meltinh, generating a large volume of magma.
Second the A large mantle plume begins to raise from the deep within the earth. This is because the increased pressure and volume forces the magma to go out.
Third Magma finds its way to the surface via fissures, causing an initial massive extrusion of flood basalts.
Fourth The eruptions begin to wein as the plume head is emptied.