Keywords: Grand Canyon Supergroup showing Cardenas Lava.JPG See file name <br> Photo Unkar Creek Delta on Colorado River near the start of the basement rocks in Grand Canyon the start is just upstream <br>The horizontal cliff at top of the 15 degree angular unconformity is the en Tapeats Sandstone 4 Horizontally laid deposited layers are shown in this photo below the en Tapeats Sandstone The top layer is at photo top-right The first 2 layers are in Grand Canyon Supergroup- of 4 units 3 of 4 -Chuar Group 2 of 4 -Nankoweap Formation 3 and 4 are layers No 5/6 of the en Unkar Group - unit 1 of 4 in the Supergroup Unkar Group unit 6 of 6 - en Cardenas Lava unit 5 of 6 -Dox Formation <br><br>The 4-layers are conformablly laid no timegaps The contact above the Sixty Mile Formation unit 4 of 4 /Chuar Group is a en fault geology with Vishnu Schist mostly found later downstream another fault in the Granite Gorge- but with the bottom units of the series the lowest of Unkar Group unit 1 of 6 <br>Note Basalt Creek delta is in the Dox Formation the cliffs directly up creekside go into the overlying Cardenas Lava maybe 40-80 ft thick at creekside but the Cardenas Lava in places is up to 800 ft thick http //www nature nps gov/geology/parks/grca/age/index cfm National Park Service 36 033241 -111 852922 region US-AZ_heading 348 PD-USGov ImageNote 1 345 250 173 40 800 524 2 Unkar Creek Rapids ImageNoteEnd 1 ImageNote 2 39 243 116 49 800 524 2 Unkar Creek ImageNoteEnd 2 ImageNote 3 342 130 169 29 800 524 2 Basalt Cliffs ImageNoteEnd 3 ImageNote 4 496 102 58 42 800 524 2 Ochoa Point ImageNoteEnd 4 ImageNote 5 245 57 86 42 800 524 2 Apollo Temple ImageNoteEnd 5 ImageNote 6 182 56 47 29 800 524 2 Jupiter Temple ImageNoteEnd 6 ImageNote 7 57 42 68 41 800 524 2 Cape Final ImageNoteEnd 7 ImageNote 8 765 94 30 29 800 524 2 Peshlakai Point ImageNoteEnd 8 Grand Canyon Palisades of the Desert East Kaibab Monocline Butte Fault Tanner Graben Colorado River in the Grand Canyon Tonto Group Bright Angel Shale Tapeats Sandstone Tapeats Sandstone cliffs Tapeats Sea Great Unconformity Grand Canyon basement rock geology Grand Canyon Supergroup Chuar Group Nankoweap Formation Unkar Group Cardenas Lava Dox Formation Apollo Temple Unkar Creek Unkar Delta Unkar Rapids Geology of Arizona |