Earth Rocks! Lab Exam #2 Notes
Hardness of Minerals:
Metals extracted from ore minerals:
Pyrite an ore mineral of iron
Chalcopyrite an ore mineral of copper (wire)
Galena an ore mineral of lead (car batteries)
Sphalerite an ore mineral of zinc
l Rocks can be deformed to produce?
Structures that can yield energy and ore reserves
2) Explain deformation.
When rocks are stressed beyond their strength, they change shape, size
3) What does compressional stress do to rocks?
1. How do waves occur?
From wind blowing over the ocean; a surface waveform of energv moves through the
water whose molecules move side to side and up and down
2. As a wave approaches the shore, what happens?
It feels bottom and breaks into su
1 What does relative time tell us?
Whether a rock is younger or older than another based on superposition, original
horizontality, crosscutting relations, and inclusions
2 Briefly explain the 4 factors
Superposition: in undeforrned, horizont
i What is the mam cause of earthquakes?
-Elasu'c rebound of the cmst as stress builds up
-Ptocks bend then eventually rupture at the hypercentre and energy radiates in all
Cycle starts over as rocks start bending again
2 Where does
9/17/2012 9:25:00 PM
Geology science that examines earth, its form and composition, and the
changes that it has undergone and undergoing.
Physical Geology a major division of geology that examines the materials
of earth and seeks to understand the
Earth Sciences 1022b Lecture Brief 27 Mar 14
MINERAL AND ENERGY RESOURCES
Metallic Mineral Deposits: ore if mined for profit; non-metallic are industrial minerals
magmatic heavy crystals like chromite and magnetite can settle in cooling pluton
Earth Sciences 1022b Lecture Brief 4 Mar 14
MOUNTAIN BUILDING and CONTINENTAL FRAMEWORKS
Continents rise above oceans due to isostasy buoyant continental lithosphere floats
on dense asthenosphere; thicker lithosphere, higher mountains with deeper roots
Earth Sciences 1022b Lecture Brief 25 Mar 14
Waves: from wind blowing over the ocean; a surface waveform of energy moves
through the water whose molecules move side to side and up and down
- as a wave approaches the shore it "feels bottom" and
Geology is important because
Solving environmental problems
Predicting/protecting against natural disasters
Where and How?
After the Big Bang (14 billion years ago)
Intro to physical geology and plate tectonics
1)What is geology important for?
-energy and natural resources, solving environmental problems, building cities and
highways, predicting and protecting against natural disasters (earthquakes, volcanic
Earth Sciences 1022b Lecture Brief 10 Mar 15
Hydrologic Cycle: 97% of Earth's water is stored in the oceans, evaporated then
precipitated on land - some soaks in (infiltration), some flows over the land as
streams (runoff), some evaporates b
Earth Sciences 1022b Lecture Brief 26 Feb 15
Continental Drift and Paleomagnetism: magnetic studies of seafloor following WWII
paleomagnetism - magnetic minerals in basalt point to the existing magnetic pole at
the time of rock crystalliza