1. Identifying Rocks

2. Igneous Rocks - Formation Magma is ejected from earth’s core Crystals form in cooling magma Crystals interlock into masses known as igneous rocks Magma is ejected from earth’s core Crystals form in cooling magma Crystals interlock into masses known as igneous rocks

3. Igneous Rocks - Identification the interlocking texture of the grains the presence of vesicules (holes) in extrusive igneous rocks may be dark-colored and heavy may display two grain sizes, one much larger than the other

4. Sedimentary Rocks - Formation Other rocks (igneous, metamorphic) or shells are weathered over time Can be formed from compaction of these sediments …or can be formed by crystallization of dissolved minerals Other rocks (igneous, metamorphic) or shells are weathered over time Can be formed from compaction of these sediments …or can be formed by crystallization of dissolved minerals

5. Sedimentary Rocks - ID grains cemented together the presence of fossils light-colored and light weight may display interlocking grains but is very light weight Layers!

6. Metamorphic Rocks - Formation “Metamorphosis” = change Sedimentary or Igneous Rocks that have been changed by intense heat or pressure “Metamorphosis” = change Sedimentary or Igneous Rocks that have been changed by intense heat or pressure

7. Metamorphic Rocks - ID the interlocking texture of large grains foliation (layering) - layers likely “bent” banded light and dark colors