Timpoweap Unit Description Update

[marshallrobinson]

Coming from Grant's email:

When I click on the Timpoweap Member just east of Hurricane I get the following popup description.

TRmt: Timpoweap Member of the Moenkopi Formation (Lower Triassic) As described above, but mapped separately in the White Hills, Jarvis Peak, and Scarecrow Peak quadrangles, and locally along the Hurricane Cliffs.

That might work in the booklet DOMU or attributes but it doesn't work for the Portal. Unfortunately, we didn't have the concept down back a few years ago.

There is a good description for Timpoweap in the St George 30x60 booklet. Please replace the old description with this one:

TRmt Timpoweap Member (Lower Triassic) – Lower part consists of light-brown-weathering, light-gray to grayish orange, thin- to thick-bedded limestone and cherty limestone; chert occurs as small disseminated blebs, thus giving weathered surfaces a rough texture; upper part consists of grayish-orange, thin- to thick-bedded, slightly calcareous, fine-grained sandstone, siltstone, and mudstone; both parts form low cliffs and ledges and form a gently undulating surface on top of the Permian-Triassic unconformity; upper contact with the lower red member is conformable and gradational and corresponds to a change from yellowish-brown, fine-grained sandstone, siltstone, and minor limestone below to reddish-brown siltstone and mudstone above (Biek, 2003b, 2007a); deposited in a shallow-marine environment (Nielson and Johnson, 1979; Dubiel, 1994; Lucas and others, 2007); Lucas and others (2007) reported a late Smithian age for the unit and reiterated a correlation with the Sinbad Limestone of central and eastern Utah; ranges from 50 to 180 feet (15–55 m) thick (Nielson, 1981).

[marshallrobinson]

Not a high-priority if you're busy with other things.

Thanks!

[annafarb]

Started working on this in the 30x60 mxd For St. George I changed the description to the one Grant provided above.

I was checking the surrounding quads and in Kanab, this is the description for TRmt:

Light gray-brown limestone, dolomite, sandstone, cherty breccia, and siltstone; thin- to thick-bedded; some sandstone beds are pebbly; upper half is more resistant and forms a cliff over a ledgy lower part; locally a thin section of tan and brown siltstone (Black Dragon Member?) underlies the unit; contact with Kaibab Formation below is an unconformity; 6 to 15 m (20-50 ft) thick at exposures on Buckskin Mountain in the southeast part of the quadrangle; well data indicate the Timpoweap may be as much as 45 m (150 ft) thick in part of the quadrangle.

Thoughts? Should I update that one as well?

[annafarb]

Anyways, looks like that unit is already updated without having to publish/cache :D