The question is :Lava from the midocean ridges creates new ocean crust in a process called __________.Can you answer PLEASE?!THANX!This is a 6th grade question.
2007-04-03 05:14:46 · 6 answers · asked by Kelsey C 1 in Science & Mathematics ➔ Earth Sciences & Geology
Seafloor spreading.
The complementary process is subduction, where the seafloor is destroyed as it is pulled under the continental shelf.
2007-04-03 05:17:20 · answer #1 · answered by DavidK93 7 · 2⤊ 0⤋
Oceanic crust is generally composed of dark-colored rocks called basalt and gabbro. It is thinner and denser than continental crust, which is made of light-colored rocks called andesite and granite. The low density of continental crust causes it to “float” high atop the viscous mantle, forming dry land. Conversely, dense oceanic crust does not “float” as high—forming lower-lying ocean basins. As oceanic crust cools, it becomes denser and ultimately sinks back into the mantle under its own weight after about 200 million years.
Peace
2007-04-03 12:20:40 · answer #2 · answered by nmp948 4 · 0⤊ 0⤋
try this link for your answer,AMNH - Spreading
lava. mantle. magma. mid-ocean ridge. ocean basins. oceanic crust. pillow lavas. plates. plate spreading ... New oceanic crust is created at the midocean ridges. ...
www.amnh.org/nationalcenter/expeditions/blacksmokers/spreading.html
2007-04-03 12:19:01 · answer #3 · answered by fushia 5 · 1⤊ 0⤋
Seafloor spreading
2007-04-03 14:05:07 · answer #4 · answered by Anonymous · 0⤊ 0⤋
not sure but its' Tactonic movement
2007-04-03 12:39:59 · answer #5 · answered by sabeen13 1 · 0⤊ 1⤋
i think it's erosion but don't trust me look it up in your book.
2007-04-03 12:17:26 · answer #6 · answered by Sylvia 2 · 0⤊ 1⤋