What event pulled the rocks apart to allow the intrusion of the Palisades magma?

Distance that lewis and clark traveled from st. louis to ft. clatsop near the pacific ocean.

Which are evidence of the seafloor spreading? a. molten material b. magnetic stripes c. continental material d. drilled core samples e. ocean water samples

Mosses, lichens and shrubs can be found where in russia? a.grasslands b.mountain regions c.coastal plains d.siberian tundra