Earth was once made of molten lava and magma, eventually cooling to form igneous rock
Weathering, Erosion, Compaction, Cementation, Heat, and Pressure eventually formed the rocks that cover our Earth’s surface.
What we know about Earth’s history comes from studying its rocks, rock formations, rock layers, and even the rocks from outer space
Meteorites 5. All meteorites formed about the same time that Earth formed, so studying them helps us study Earth. 6. Meteorites have not been affected by erosion, weathering or other forces the way Earth’s rocks have.
D – oldest – at the bottom – superposition law A – next to bottom – superposition law B Tilt – plate tectonics – Law of Horizontality E – intrusion – cross-cutting law Erosion – not horizontal/straight line - Law of Horizontality C – intrusion – Law of cross- cutting Erosion – Horizontality DABEC (old to young) E and C are igneous (magma rising) A, B, D are sedimentary (layers)
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