|Bridal Veil Limestone member of the Oquirrh Formation, Pennslyvanian in age.|
We made it into Provo Canyon. About 3 miles up the canyon, Highway 189 crossed from the north side of the canyon to the south side, ending up south of the dammed Provo River at Deer Creek Reservoir.
We started seeing some modified roadcuts.
|A modified roadcut of the Bear Canyon member of the Oquirrh Formation.|
|An original part of the roadcut can be seen in the gully ahead, although I imagine it might be hard to examine.|
|With it still raining, we finally hooked up with U.S. 40, which we had lost in Salt Lake City before we started our unplanned side trip through the Wasatch via American Fork Canyon and Utah S.R. 92.|
What I noticed when looking up info about the rock formations on this part of the trip and in the last post, was that it's possible that the Bear Canyon member of the Oquirrh Formation and Ely Limestone may be at least in part correlative (also mentioned here). It's a similar age (or the same?), reportedly has abundant nodules of black chert (Geolex), and some fossils in certain parts of the Oquirrh have been tentatively identified in rocks possibly correlative with the Ely (1998 paper here).
Baker, A.A., and Crittenden, M.D., Jr., 1961, Geology of the
Timpanogos Cave quadrangle, Utah: U.S. Geological Survey
Geologic Quadrangle Map, GQ-132, 2 sheets, scale 1:24,000.
Interactive geologic map of Utah (UGS)
My initial notes: Bridal Veil overlies Manning Cnyn Shale, but although the next formation we see looks like it could be a shale, it's more of the Bear Canyon Member of the Oquirrh. This was named as the basal member of the Oquirrh Fm in an area where the Bridal Veil Limestone does not occur or doesn't otcp.
Geloex (Bear Canyon): says "gray to tan and reddish-brown, limy to quartzitic sandstone with thin to thick beds of gray to black limestone, in part sandy, and in part with abundant nodules and stringers of black chert" -- both of these units, their age and description (and not so much what I've seen of their otcp or exposure) remind me of the Ely Limestone, which we saw here and here (search blog="oquirrh" for one, including "ely") (blah blah). And indeed, the fossils within certain parts of the Oquirrh have been tentatively identified in rocks possibly considered part of the Ely (1998 paper here)
Going back to Roberts Horn (last post) and here - it might even look like the Ely!
Across the West and Back Day 2: Over the Wasatch Range
Across the West and Back Day 2: Are We Lost Yet?
Across the West and Back Day 2: A Hike along a Limestone Ridge
Across the West and Back Day 2: Across the Salt Lake Desert
Across the West and Back Day 2: A Side Trip in West Wendover
Across the West and Back Day 2: Pequop Summit to West Wendover
Across the West and Back Day 2: Looking for an Old Roadcut
Across the West and Back: The First Day
Intro to Recent Western Loop Trip