different rocks

different rocks

a geologist's guide

Igneous rocks

description

• Usually gray or black

• Are formed when magma comes out of the core and cools.

• unlike most rocks, there is only one specific type of igneous rock that will fizz when in contact with hydrochloric acid(Hl)

Sedimentary rocks

• These rocks can be all colors except purple and have distinct layers.

• are formed with rock chips, bones, water, erosion, clay, and time.

• are often found in Utah(where I live) and other states that used to be underwater.

• almost all rocks that are sedimentary will fizz when in contact with Hl

Metamorphic rocks

• they are in all different colors

• they are formed under intense heat and pressure

• they have crystals in them sometimes

• only some metamorphic rocks react to Hl

Poll

do you feel like you know the different types of rocks?

• yes

• no

• I need a little more practise

• i don't like this subject