US Flag old style pin

US Flag old style pin

I received this pin from Ron Eberhardt, one he acquired at a professional meeting. It is not evident from the picture, but it is a quite old pin. Since I have several US Flag pins I wanted to tie this pin to my posts about geology. I will do that for every state as I add pins and edit posts.

For state geology references see Wikipedia (http://en.wikipedia.org/wiki/Geology_of_the_United_States)

The diversity of our nation’s landscapes can be easily seen on the shaded relief image above. The stark contrast between the “rough” texture of the western US and the “smooth” central and eastern regions is immediately apparent. Differences in roughness (topographic relief) result from a variety of processes acting on the underlying rock. As you might guess, the plate tectonic history of a region strongly influences the rock type and structure exposed at the surface, but differing rates of erosion that accompany changing climates can also have profound impacts on the land. If you spend a moment observing the map above you will probably be able to distinguish the boundaries between several geologic provinces.

Topography and regional division of US

Topography and regional division of US

Each province has its own fascinating geologic history and unique features. Our National Parks preserve some of the most scenic elements of our country’s rich geological heritage. Click

US Physiographic Regions

US Physiographic Regions

on either the map below or the links at the bottom of the page to explore each region. There will also be a link to lists of National Parks showcasing each geologic province’s geology. The labels for the regions are shown on the next graphic.

 

Location:
17-E4

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