asbogstudy5

A negatively charged ion

The zone of metatmorphosed rock surrounding an igneous intrusion and showing the effectgs of contact metamorphism

A unit of pressure equal to 10⁶ dynes/cm², approx 1 atmosphere

The sequence of minerals that form in the process of fractional crystallization of a magma

a type of low-grade regional metamorphism affectin sediments and interlayered volcanic rock that has lower temps (200C to 450C) without any influence of orogenesis or magmatic intrusion

A positively charged ion

A number that represents the percent by weight or volume of dark-colored minerals in a rock

Metamorphism associated with the intrusion of an igneous mass. Relatively low pressure (<3000 bars) temps range from 200C to 1000C

The physical and chemical changes undergone by sediments when compacted and lithified

The oceanic part of a geosyncline characteriazed by volcanism associated with clastic sedimentatoin

Igneous rocks that ahve been erupted on the surface of the earth

A mappable, areally restrcited part of a rock body that has different fossils or lithology from other contiguous beds deposited at the same time

A major downwarp in the Earth's crust in which sediments accumulate

Igneous rocks that have been formed within the Earth by emplacement of magma into pre-existing rock

A set of metamorphic mineral assemblages that have reached chemical equilibrium during metamorphism within a restricted range of temperature and pressure conditions

The intensity or rank of metamorphism, measured by the amount or degree of difference between the original rock and metamorphic rock

The process of mineral replacement whereby a new mineral of a different chemical composition grows in an old mineral. Interstitial liquids or gases must be present for solution and deposition to occur

A naturally occurring, inorganic substance, usually having an internal crystal structure

The minerals that compose a rock, including the differnt kinds and their relative abundance

Igneous rocks formed from a large intrusion at depth

The place of origin from which the constituent materals of a sedimentary rock or facies

Metamorphism acting over a large areas resulting from applied pressures of 3000 to 10000 bars and temperatures of 400C to 800C.

The withdrawal of the sea from land

A rock unit that is characterized by a particular homogeneous lithology or combination of lithologies without regard to time boundaries

Compounds whose crystal structure contain SiO₄ tetrahedra, either isolated or joined to form groups, rings, chains, sheets or three-dimensional frameworks

A series of minerals of identical structures that contain a mixture of 2 elements over a range of proportions

A rock unti that is characterized by formation during a specific period of time without regard to lithology

The advance of the sea onto land

Igneous rocks that are generally finely crystalline or glassy, resutling from volcanic action at or near the earth's surface, either ejected explosively or extruded as lava

A large group of hydoraluminosilicate minerals that are analogous in composition to the feldspars