Tuzo Wilson attributed his epistemology to Thomas Khun. Limestone is the rock most rapidly weathered in humid climates. Mechanical weathering dominates in areas of high topographic relief. Karst topography is formed by chemical solution of limestones. The opening of the Red Sea occurred during the Miocene.
Some plagioclases show a zoned pattern because the cooling of the magma was rapid.
Coral reefs are built by large communities of carbonate secreting corals and coralline algae. Silica is secreted by diatoms , radiolarians , and sponges.