Blog #5

1. Identify the two main types of igneous rocks-Obsidian is a dark-colored volcanic glass that forms from the very rapid cooling of molten rock.

Diorite is a intrusive igneous rock that contains a mixture of feldspar, pyroxene, hornblende and sometimes quartz.

2. Identify the two main types of metamorphic rocks-Phyllite is a foliate metamorphic rock that is made up mainly of grained mica
Marble is a non-foliated metamorphic rock that is produced from the metamorphism of limestone



3. Identify the two main types of sedimentary rocks. Coal is a sedimentary rock that forms from plant debris

Rock Salt is a chemical sedimentary rock that forms from the evaporation of ocean or saline lake water