Notes

Slide Show

Outline

1	April 27, 2002 A Sense of Place
2	These mountains are at your front door. They don’t have to remain a mystery.
3	Annual Precipitation
4	Vegetation change tells a Sky Island story.
5	Even dead trees can tell a story…
6	Messengers from deep in Earth’s crust tell a story about Tucson’s evolving landscape.
7	Metamorphic Rocks Recrystallization in the solid state (heat and pressure but little to no melting) modifies the minerals and texture of a prexisting rock.
8	Heat and Pressure transform igneous and sedimentary rocks to metamorphicrocks.
9	Increasing Pressure and Temperature >>>>
10	Textures indicate direction of tectonic forces.
11	Reading deformation from metamorphic fabric. Example: Development of foliation.
12	Metamorphic rocks formed in zones of convergence between plates. Colliding continents produce metamorphic rocks.
13	India – Asia collision produced Himalaya
14	Tortured rocks that were once on the sea floor between India and Asia
15	Metamorphic rocks formed in Appalachians by collision of North America & Africa.
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17	The Geopuzzle of Saguaro National Park East
18	Operation of a Detachment Fault
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21	Catalina Detachment Fault is NOT flat. It has huge corrugations.
22	Why do the Catalina Mountains look like an arrowhead pointed at the Tucson Mountains?