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| 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. |
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| a cylindrical conduit kown as a volcanic pipe that connects its crater with an unerlying magma chamber. |
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| Consequently, much of the volcano is erdoded but the pipe remains as a remnant called a volcanic neck |
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| the largest of all plutons, must have at least 100km2 of surface area, and most are far larger. |
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| in contrast to a batholith it is similar but smaller. |
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| flows are essentially explosive 'avalance" of hot volcanic dust "Glowing avalance" |
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| A "crater" in the center of a composite volcano resulting from the collapse of the floor of the volcano |
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| A bulge in a volcano caused by intrusion of highly viscous magma |
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| pieces of rock shot into the air |
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| irregular blobs are masses; generally conform to a magam chamber, granite in comp |
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| If the intrusive feature cuts across the grain. |
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| IF the intrusive feature conforms the grain |
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| A disconcordant tabular body |
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| A concordant tabular body is concordant |
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| Areas of erosion, larger particle sizes, rounded grains, poor preservaion of fossil remains |
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| Areas of quiet deposition, low circulation maybe- anoxic conditions, Finer particle sizes, preservation of fossils is good. |
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| Rock materials pass directly into solution (EG Halite or Calcite) Carbonic acid is a big playa |
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| CHemical union of water with minerals. "Clays are hydrated silicates" |
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| Chemical combination with a oxygen and a mineral. Results in a totally different mineral.Eg. Hematite |
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| deposited in horizontal layers |
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| Ice, wind, water (turns big pieces to small) abrasion and frost wedging |
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| Dissolution- rocks are altered are dissolved by water. |
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| what system is the key to sedimentary rocks. |
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| Fluvial (rivers), Alluvial Fans, Glaciers, Eolian |
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| Name the continual systems. |
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| Shorelines, deltas, beaches, barrier islands |
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| What are transistional Depositonal systems |
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| Compaction and Cementation; sediments compressed by its own weight; Material becomes cemented together, process is called... |
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| Composed of grains or pieces of orginal rock material ( SIze of grains matter) |
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| Chemical or biochemical chemical composistion of the rock matters, usually a percipitate, evaporate, or shell material |
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