light--------to------dark Process: --&gt; weathering, transportation, deposition SEDIMENTS: formed from weathering of other rocks Process: --&gt; lithification (compaction &amp; cementation) SEDIMENTARY ROCKS: - formed from consolidation of sediments - products of weathering - very useful for environmental reconstructions - 3 basic types: 1) Detrital sedimentary rocks: direct products of weathering, lithic fragments - breccia - conglomerate - sandstone - siltstone - shale 2) Chemical sedimentary rocks: precipitated - evaporites 3) Biochemical sediments: formed from critters dying (may contain fossils) - coal - limestones - chert Process: --&gt; burying, heating, and altering (heat-pressure-fluids) METAMORPHIC ROCKS: - Formed by the burying and sometimes (usually) the heating of existing rock - Application of Pressure, Temperature and/or Fluids - Protolith (original rock type) Composition matters as well: because the minerals in the protolith will affect the type of changes and minerals that grow in the rock during metamorphism -
(critters; dying; ) (changes and minerals; grow; L:in the rock; T:during metamorphism) (formed from critters; may contain; fossils) (the minerals in the protolith; will affect; the type of changes and minerals)
critters changes and minerals formed from critters the minerals in the protolith
dying grow may contain will affect
L:in the rock T:during metamorphism
fossils
the type of changes and minerals