Which provides the most conclusive evidence for plate movement?

Question

A. magnetic anomalies in the ocean crust

B. Fossil in marine deposits

C. rock types on the Earth's crust

D. paleoclimatic deposits

Answer 1

The study of paleomagnetism has discovered bands of rocks with the iron minerals having alternating polarities in symmetrical arrays moving away from mid-ocean ridges, indicating that the plates are moving.

****mrwizard9090: You are right, but educaton in today's schools is flawed and the question asked for the

'most conclusive'. In which case, its symmetric bands of opposite polarity iron mineras.

Answer 2

actually, all of them support it.

a. bands of magnetism mirror each other on opposite sides of the mid-ocean ridges.

b. fossils in marine deposits are older near subduction trenches and younger near the ridges.

c. continuations of rock trata are found in s america and africa.

d. same as 3. plate movements split coal seams.

Answer 3

I thought the tectonic plates moved because of thermodynamics,is it not something to do with magma,it's been a long time since i went to school,maybe i can learn something here,i want to know why?

Answer 4

A. but also C

From the list you give, A gives evidence of plate movement, specifically of "Seafloor Spreading" Magnetic surveys of oceanic crust in the 1960's showed a series of "stripes" arranges symmetrically about the mid-oceanic ridges showing evidence of reversals of the earth's magnetic field. The symmetrical arrangement shows evidence for crustal production at the mid-oceanic ridges.

C gives evidence that a particular location experienced different  climatic zones in different geological times - for example Britain experienced desert conditions in the Permian, and tropical/subtropical conditions in the Cretaceous which supports the view it was moving from equatorial to tropical lattitudes between these times (of course, it is a bit more complex than that)