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.
A Scurry County farm house The historical marker is for Wheat, Texas the town that evolved into Hermleigh Photo Courtesy Charlene Beatty Beauchamp, 2001. History in a Pecan Shell The name Hermleigh dates from 1907 with the establishment of a post office.