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.
Most of the continental mountain belts occur where plates are pressing against one another. The white squares locate examples given here of the different tectonic and earthquake environments. (topography from NOAA) There are three main plate tectonic environments: extensional, transform, and compressional.