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Details Title: volcano Description: ahhhhh Total Flash Cards: 30 Created: 10/15/2006 19:28:43	To study from this set of flash cards, or to create your own your own study flash cards, register HERE. If you are already a registered user, CLICK HERE.
Cards Term Sills Definition Sheetlike Plutons Term Laccolilths Definition Are similar to sills in that they are concordant, but instead of being tabular, they havye a mushroom like geometry. Then tend to have a flat floor and are domed up. Term Volcanic pipe Definition a cylindrical conduit kown as a volcanic pipe that connects its crater with an unerlying magma chamber. Term Volcanic neck Definition Consequently, much of the volcano is erdoded but the pipe remains as a remnant called a volcanic neck Term Batholith Definition the largest of all plutons, must have at least 100km2 of surface area, and most are far larger. Term Stock Definition in contrast to a batholith it is similar but smaller. Term pyroclastic Definition flows are essentially explosive 'avalance" of hot volcanic dust "Glowing avalance" Term Caldera Definition A "crater" in the center of a composite volcano resulting from the collapse of the floor of the volcano Term Dome Definition A bulge in a volcano caused by intrusion of highly viscous magma Term aeolian Definition Ash deposits Term Tephra Definition pieces of rock shot into the air Term Batholiths Definition irregular blobs are masses; generally conform to a magam chamber, granite in comp Term Discordant Definition If the intrusive feature cuts across the grain. Term concordant Definition IF the intrusive feature conforms the grain Term Dike Definition A disconcordant tabular body Term Sill Definition A concordant tabular body is concordant Term HIgh energy conditions Definition Areas of erosion, larger particle sizes, rounded grains, poor preservaion of fossil remains Term Low energy conditions Definition Areas of quiet deposition, low circulation maybe- anoxic conditions, Finer particle sizes, preservation of fossils is good. Term Dissolution Definition Rock materials pass directly into solution (EG Halite or Calcite) Carbonic acid is a big playa Term Hydrolysis Definition CHemical union of water with minerals. "Clays are hydrated silicates" Term Oxidation Definition Chemical combination with a oxygen and a mineral. Results in a totally different mineral.Eg. Hematite Term Sedimentary rocks Definition deposited in horizontal layers Term Physical weathering Definition Ice, wind, water (turns big pieces to small) abrasion and frost wedging Term Chemical weathering Definition Dissolution- rocks are altered are dissolved by water. Term Depositional system Definition what system is the key to sedimentary rocks. Term Fluvial (rivers), Alluvial Fans, Glaciers, Eolian Definition Name the continual systems. Term Shorelines, deltas, beaches, barrier islands Definition What are transistional Depositonal systems Term Compaction and Cementation; sediments compressed by its own weight; Material becomes cemented together, process is called... Definition Process of Diagenisis Term Detrital or clastic Definition Composed of grains or pieces of orginal rock material ( SIze of grains matter) Term Non-clastic Definition Chemical or biochemical chemical composistion of the rock matters, usually a percipitate, evaporate, or shell material