ÿþ<!doctype html public "-//w3c//dtd html 4.0 transitional//en"> <html> <head> <title>Montana</title> </head> <body background="images/graysandstone.jpg"><font face="arial"> <br> <h1 align="center">Montana</h1> <br> <br> <TABLE> <TABLE BORDER="10" CELLSPACING="2" CELLPADDING="3"> <TR> <TD align="center"><IMG ALT="Pinedale Lake: Glacial U-shaped Valley" SRC="images/pinedalelake1.jpg" width=400 height=300></TD> <TD align="center"><font size="4"><b>Kelly Reservoir located in the Pioneer Mountains. Notice the U-shaped valley in the background. This is a result of advancing glaciers. There are two major glacial advances that took place here. The Bull Lake (~150 Ka), and the Pinedale (~10 Ka). </b></font></TD> </TR> <TR> <TD align="center"><font size="4"><b>These are textbook examples of triangular facets. They are formed from faulting and erosion. These are located somewhere between Dillon, MT and Jackson Hole, WY (sorry, I wasn't paying attention - except for the geology!) </b></font></TD> <TD align="center"><IMG ALT="Triangular Facets" SRC="images/trianglefacets.jpg" width=400 height=300></TD> </TR> <TR> <TD align="center"><img alt="Frying Pan: Montana" src="images/fryingpan.jpg" width=400 height=300></a></TD> <TD align="center"><font size="4"><b>This is an example of anticlinal and synclinal folding. Imagine the Earth's crust acting as a sheet of paper and compressive (pushing in) forces act upon the sides of this paper. This is how these folds are formed. These folds have been weathered and the tops of the peaks have been severely eroded. <br> <br>Notice the nose of the anticline in the middle of the picture in the distance. This is called the axis. </b></font></TD> </TR> <TR> <TD align="center"><font size="4"><b>This is a close-up of the axis of an anticline. <br><br>A note on the ridges and valleys: Ridges are usually remnants of resistant rocks like sandstone and limestone. Valleys are formed from weathering of less resistant rocks like shale.</b></font></TD> <TD align="center"><img alt="Nice axis!" src="images/axisofanticline.jpg" width=400 height=300></td> </tr> </TABLE> <br> <br> <Center> <TABLE> <center><b>Go Back To:</b> <TABLE BORDER="5" CELLSPACING="2" CELLPADDING="2"> <TR> <TD align="center"> </td> <TD align="center"> <a href="index.html">Main Page</a></TD> <TD align="center>" </td> </TR> <TR> <TD align="center"> <a href="alabama.html">Alabama</a> </TD> <TD align="center"> <a href="arkansas.html">Arkansas</a></TD> <TD align="center"> <a href="idaho.html">Idaho</a></TD> </TR> <TR> <TD align="center"> <a href="montana.html">Montana</a></TD> <TD align="center"> <a href="northcarolina.html">North Carolina</a></TD> <TD align="center"> <a href="oregon.html">Oregon</a></TD> </TR> <TR> <TD align="center"> <a href="virginia.html">Virginia</a></TD> <TD align="center"> <a href="washington.html">Washington</a></TD> <TD align="center"> <a href="wyoming.html">Wyoming</a></TD> </TR> </TABLE> </font> </body> <html>
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