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.
Hale County is a county located in the U.S. state of Texas. As of the 2010 census, its population was 36,273. The county seat is Plainview. The county was created in 1876 and organized in 1888. It is named for Lt. John C. Hale, a hero of the Battle of San Jacinto.