Earth Science Q2 continued

Question Answer
composition of igneous rocks felsic and mafic
feLSic composition of igneous rock-lighter color, lower density, rich in Silicon and aLuminum
MafIc composition of igneous rock-darker color, higher density, rich in Iron and Magnesium
Basalt formation=extrusive, texture=fine, color=darker, composition??
granite formation=intrusive, texture=coarse, color= lighter, composition ??
sedimentary rocks are formed by by the deposition of weathered rocks, deposition of biological activity, precipitation from solution
deposition of biological activity shells and fossils
compaction sedimentary rocks-squeezes
erosion sedimentary rocks-movement
uplift sedimentary rocks-raised
cementation sedimentary rocks-natural gas
weathering sedimentary rocks-broken down
deposition sedimentary rocks-drops
classification of sedimentary rocks clastic, chemical, organic
clastic sedimentary rocks-composed of weathered bits of rocks and minerals, classified by particle size
how are clastic rocks classified by particle size
chemical sedimentary rocks-forms when dissolved minerals precipitate from water solutions, water usually evaporates or boils, ex limestone, and rock salt
example of sedimentary rocks formed by chemicals limestone, rock salt
5 key words related to sedimentary rocks compaction, erosion, uplift, cementation, weathering, deposition
features of sedimentary rocks super positioning, ripple marks, fossils, mud cracks
super positioning in undisturbed rocks, the oldest layers are found on the bottom and the youngest at the top,
ripple marks rock formed along the beach or stream bed
fossils braces of remains of ancient life
mud cracks formed when wet mud of clay dried and shrank leaving a rock record of a dry environment