Multiple sclerosis (MS) is an unpredictable, often disabling disease of the central nervous system that disrupts the flow of information within the brain, and between the brain and body.
The Laramide orogeny was a period of mountain building in western North America, which started in the Late Cretaceous, 70 to 80 million years ago, and ended 35 to 55 million years ago. The exact duration and ages of beginning and end of the orogeny are in dispute.welve kilometers of structural relief between basins and adjacent uplifts is not uncommon. The basins contain several thousand meters of Paleozoic and Mesozoic sedimentary rocks that predate the Laramide orogeny. As much as 5000 m of Cretaceous and Cenozoic sediments filled these orogenically defined basins.
The Rise of The Cephalopods. The Ordovician Period is the second period of the Paleozoic Era. Ordovician rocks were first found in Wales, so its name comes from a tribe of people who once lived in the area where the rocks were found. The Ordovician began about 490 million years ago and lasted for about 47 million years. The Continents-Gondwanaland. Gondwana was a huge supercontinent during the Ordovician Period.