Definition of a Plume. Stress- and dike-based models recognize that the difference between a surface volcano (âhotspotâ) and sills, intrusion, magma chambers and underplating is simply one of the orientation of the stress field, not the absolute temperature of the mantle, or even the magnitude of the stress.
Hempstead is a city in Waller County, Texas, United States, part of the HoustonâThe WoodlandsâSugar Land metropolitan area. It is the county seat of Waller County.
Cypress Top Historic Park, located at 26026 Old Hempstead Highway in Cypress, TX 77429, is run by Harris County. The park grounds are open daily, and building tours are given on Tuesdays by Harris County historians and volunteers from the Cypress Historical Society.