Show:
rocks
Time line
Fossils
Grand canyon
Earths core
100
what is volcanic glass occurring in different colors but often black it forms from lava that cools so quickly that crystals have no time to form.
obsidian
100
What is today on the time line
0.0
100
to discover the creature or plant it came form
why are fossils important to geology
100
limestone What is at the bottom of the grand canyon
limestones
100
What is inner core is solid 4700'c to 4800'c 3 to 4 millions .at the center of the earth solid iron and nickel
inner core
200
What is dark -colored, coarse grained crystalline contains little if any quartz mostly composed of feldspar , olivine and pyroxene minerals.
What is gabbro
300
composed of volcanic ash and glass particles could be considered a sedimentary often light color and not very dense
What is tuff
400
composed of large rounded pieces of rocks the grains are larger the those that makes up sandstone.
What is conglomerate