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I. Introduction
Erosion rate: 4 cm per 1000 years
Erosion rate: 14 cm per 1000 years
I. Introduction
Erosion rate: 4 cm per 1000 years, or 0.000131 ft/yr
Rate x Time = Distance
.000131 ft * Time = 20,000 ft yr
Time = ???
I. Introduction
Erosion rate: 4 cm per 1000 years, or 0.000131 ft/yr
Rate x Time = Distance
.000131 ft * Time = 20,000 ft yr
Time = 152 million years
I. Introduction
Erosion rate: 4 cm per 1000 years, or 0.000131 ft/yr
Rate x Time = Distance
.000131 ft * Time = 20,000 ft yr
Time = 152 million years
II. The endogenic effect
A. Overview
“The difference between the two massesrepresent a balance in endogenic mechanics”
Archimede’s Principle: An object is immersed in a fluid is buoyed up by a force equal to the weight of the fluid displaced by the object.
II. The endogenic effect
B. Epeirogeny
“uplift or depression on a regional scale, with minimal disruption of original rock structure”
e.g.: isostacy
D. Volcanism
1. Lava Plains and Plateaus
2. Shield Volcanoes
3. Cindercone Volcanoes
4. Composite Volcanoes
Orbital Eccentricity100,000 yr cycle
Axial Tilt41,000 yr cycle
Precession of Equinoxes(wobble effect)11,000 yr cycle
Milankovitch Cycles