Paleoclimate of the Upper Jurassic Morrison Formation in Oklahoma and Texas

Myers, Timothy S.; Tabor, Neil J.; Bateman, Jesse Bloom; May, Steven R.; Jacobs, Louis L.; Weil, Anne

doi:10.1130/abs/2018am-321598

Cited by 2 publications

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“…Detrital zircon geochronology from a sandstone in this area produced abundant Late Jurassic grains but no Cretaceous grains. Although not unique, this pattern is consistent with a Morrison Formation correlation as concluded by Myers, et al (2018). Unfortunately, no vertebrate fossils were found at this locality.…”

Section: Detrital Zircon Geochronologysupporting

confidence: 89%

A record of Late Jurassic vertebrates from Texas

May

Bader

Boucher

et al. 2023

Rocky Mountain Geology

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We present the first description of Jurassic vertebrate fossils from Texas. The vertebrate specimens were collected from the Upper Jurassic Malone Formation in the Malone Mountains of western Texas. The specimens are fragmentary and not particularly diagnostic, but probably represent elements of plesiosaurians. One specimen is similar to the caudal vertebra of a pliosaurid plesiosaurian, whereas another may be a partial propodial of a small plesiosaurian. Additional bone fragments are not identifiable at this time. These vertebrates were discovered along with abundant plant and invertebrate fossils. Previous studies of the invertebrate fossils indicate a Kimmeridgian to Tithonian age for the Malone Formation, which is consistent with a single grain age of 151±2 Ma from detrital zircon U–Pb geochronology obtained in this study. The Malone Formation was deposited in shallow marine to marginal marine environments along the northern edge of the Chihuahua trough. It is correlative with the La Casita and La Caja Formations of northern Mexico, where similar marine vertebrates have been reported. The Malone Formation is also correlative with the Morrison Formation to the north.

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Section: Detrital Zircon Geochronologysupporting

confidence: 89%

A record of Late Jurassic vertebrates from Texas

May

Bader

Boucher

et al. 2023

Rocky Mountain Geology

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show abstract

“…The type skull (USMN 15583) includes 13 unfused epiossifications, further suggesting sub-adult status. Regardless, T. utahensis is one of the largest chasmosaurines with a constructed composite frill width of 1.7 meters (using all known squamosals and parietals except USNM 16169) and overall skull length (based suggests that there was not significant rainfall seasonality (Myers et al, 2018), which may differentiate the region from the more intensively studied central basin . In 2012 a new site, OMNH V1694, was discovered.…”

Section: Discussionmentioning

confidence: 99%

14th Symposium on Mesozoic Terrestrial Ecosystems and Biota

2023

The Anatomical Record

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Paleoclimate of the Upper Jurassic Morrison Formation in Oklahoma and Texas

Cited by 2 publications

References 0 publications

A record of Late Jurassic vertebrates from Texas

A record of Late Jurassic vertebrates from Texas

14th Symposium on Mesozoic Terrestrial Ecosystems and Biota

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