University College - Geology
390 - Special Field Studies
Arizona & Grand Canyon Field Trip - May 2005
In order to fully appreciate and understand the geology of the Arizona and the Grand Canyon it would be a good idea to learn the names and lithologies of the major rock units that we will see. To give you a start in that direction I have created an annotated view of the Grand Canyon (as seen from the south rim), plus a simple stratigraphic column of the Paleozoic rocks.
I recommend that you print out the stratigraphic column, and then colour in the various formations using colours that correspond with those of the different units as seen in the light at the time that the photograph was taken.
On the Kaibab.org website (http://www.kaibab.org/geology/gc_layer.htm) Bob Ribokas has provided a useful mnemonic to help with learning the names of most (but not all) of the Paleozoic formations:
|Know||Kaibab Fm. (limestone and dolomite)|
|The||Toroweap Fm. (siltstone, sandstone, limestone)|
|Canyon's||Coconino Fm. (quartz sandstone)|
|History,||Hermit Fm. (mudstone, siltstone, sandstone)|
|Study||Supai Gp. (mostly sandstone and siltstone, some shale)|
|Rocks||Redwall Fm. (limestone and dolomite with chert)|
|Made||Muav Fm. (dolomite and shale)|
|By||Bright Angel Fm. (mostly siltstone)|
|Time||Tapeats Fm (sandstone and conglomerate)|