The list of other possible causes for a drop in a personâs white blood cell count is long. Autoimmune disorders, congenital disorders that affect the way bone marrow works, disorders of the spleen, certain infectious diseases, cancer and parasitic diseases, among others, can all lead to low white blood cell counts.
Best Answer: Mountains can form at all three types of plate boundaries, convergent, divergent, and transform. At divergent boundaries new crust is being formed. The mid-Atlantic ridge is part of the longest mountain range on the planet, it just happens to be mostly covered by ocean.
The Earthâs crust and upper mantle (lithosphere) is divided into many plates, which are in constant motion. Where plate edges meet and one plate may slide past another, one plate may be driven beneath another (subduction). Upwelling volcanic material pushes plates apart at mid-ocean ridges. Continental plates are made of less dense rocks (granites) that are thicker than oceanic plates (basalts) and thus, ârideâ higher than oceanic plates.