cristobalite A high temperature form of quartz SiO2 which has a stability field at atmospheric pressure above 1470°C and below 1713°C, at which latter temperature cristobalite melts and the quartz liquidus is reached; sp. gr. 2.32; occurs as fine aggregates in cavities in basalts and in some thermally metamorphosed (see CONTACT METAMORPHISM) sandstones.
More From encyclopedia.com
Thermosphere , Based on the vertical temperature profile in the atmosphere, the thermosphere is the highest layer, located above the mesosphere . While in the tropo… Thermometer , A thermometer is a device that registers the temperature of a substance relative to some agreed upon standard. Thermometers use changes in the physic… Mesosphere , Based on the vertical temperature distribution in Earth's atmosphere, four semi-horizontal layers or "spheres" can be distinguished: the troposphere,… Temperature Inversion , temperature inversion An atmospheric condition in which the typical lapse rate is reversed and temperature increases vertically through a given layer… Effective Temperature , effective temperature Isotherm , Isotherm Isotherms are lines that connect points of equal temperature on weather maps, so at every point along a given isotherm the temperature value…
About this article
Updated About encyclopedia.com content Print Article
You Might Also Like