North American coral recovery after the end-Triassic mass extinction, New York Canyon, Nevada, USA

Hodges, Montana S.; Stanley, George D.

doi:10.1130/gsatg249a.1

Cited by 13 publications

(8 citation statements)

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“…Early Jurassic corals are rare in North America (Beauvais, 1989). Here we establish absolute ages of Early Jurassic North American corals during the time of recovery after the end-Triassic mass extinction, and this supports a recovery for corals of eastern Panthalassa earlier than previously thought (Hodges and Stanley, 2015).…”

Section: Introductionsupporting

confidence: 77%

“…Low-diversity Early Jurassic corals are reported from Chile and Peru (Prinz, 1991). The precise age of rocks containing corals of Early Jurassic age in North America are rather poorly constrained relative to the Tethyan sites of Eurasia (Hodges and Stanley, 2015). Considering the general scarcity of Early Jurassic corals in North America, the applications of detrital zircon U-Pb geochronology for Early Jurassic coral-bearing rocks presented here may help clarify these inequities and also provide a more complete picture of this major mass extinction and recovery.…”

Section: Significance Of Zircon Ages To Early Jurassic Coral and Reefsmentioning

confidence: 92%

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Detrital zircon U-Pb geochronology of the Sierra de Santa Rosa Formation, Sonora, Mexico, and implications for an Early Jurassic retroarc basin

et al. 2017

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A succession of Triassic to Jurassic strata occurs in the vicinity of Caborca, Mexico, where the Antimonio, Río Asunción, and Sierra de Santa Rosa Formations contain a nearly continuous marine section deposited in previously reported shallow basin environments. The Sierra de Santa Rosa Formation is known to be Early Jurassic, but with an 18 m.y. uncertainty in age. Here we establish the ages of the three members of the Sierra de Santa Rosa Formation as early Sinemurian to middle Toarcian. Detrital zircon U-Pb geochronology from a set of 2334 grains along with ammonite zonation is used to establish depositional ages and to support the interpretation of the formation as being deposited in a retroarc basin. We find 2 zircon populations of 199 Ma and 192 Ma that mark the onset of Early Jurassic magmatic activity in the formation. Older Neoproterozoic and Early Devonian populations not attributable to local sources imply a robust Early Jurassic exchange with southwestern Laurentian eolianites. Here we also establish the ages of three fossiliferous units containing solitary and colonial corals in the Sierra de Santa Rosa Formation. The end-Triassic mass extinction decimated coral reefs worldwide and reports of Early Jurassic corals have been particularly rare in North America. The ages indicate an earlier regional recovery for North American corals than previously proposed; this has implications for understanding postextinction reef recovery.

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Section: Introductionsupporting

confidence: 77%

Section: Significance Of Zircon Ages To Early Jurassic Coral and Reefsmentioning

confidence: 92%

Detrital zircon U-Pb geochronology of the Sierra de Santa Rosa Formation, Sonora, Mexico, and implications for an Early Jurassic retroarc basin

et al. 2017

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“… 38 ), which is also recorded in Peru 37 and Austria 39 . Trophic complexity matching or surpassing pre-extinction conditions 40 and a return to carbonate-dominated benthic biota 36 , including the first North American Jurassic corals 41 , did not occur until ∼2 million years after the extinction (recovery state 2 in Fig. 3 ).…”

Section: Resultsmentioning

confidence: 98%

Mercury anomalies and the timing of biotic recovery following the end-Triassic mass extinction

et al. 2016

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The end-Triassic mass extinction overlapped with the eruption of the Central Atlantic Magmatic Province (CAMP), and release of CO2 and other volcanic volatiles has been implicated in the extinction. However, the timing of marine biotic recovery versus CAMP eruptions remains uncertain. Here we use Hg concentrations and isotopes as indicators of CAMP volcanism in continental shelf sediments, the primary archive of faunal data. In Triassic–Jurassic strata, Muller Canyon, Nevada, Hg levels rise in the extinction interval, peak before the appearance of the first Jurassic ammonite, remain above background in association with a depauperate fauna, and fall to pre-extinction levels during significant pelagic and benthic faunal recovery. Hg isotopes display no significant mass independent fractionation within the extinction and depauperate intervals, consistent with a volcanic origin for the Hg. The Hg and palaeontological evidence from the same archive indicate that significant biotic recovery did not begin until CAMP eruptions ceased.

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“…3A ). Late Triassic and end-Triassic extinction events ( 5 , 47 , 48 ) were thus survived by diverse lineages of plesiosaurians in addition to parvipelvian ichthyosaurs ( 1 , 6 ). Most groups that went extinct during these events inhabited coastal waters and shallow carbonate platforms (Placodontia, Nothosauroidea, non-plesiosaurian Pistosauroidea, and Tanystropheidae) ( 1 , 5 , 6 ) but not the open sea.…”

Section: Discussionmentioning

confidence: 99%

“…3B ). Open-marine adaptation of plesiosaurians may have facilitated their survival into the Jurassic ( 46 ) because pelagic prey (fish and soft-bodied cephalopods) ( 47 ) were less affected by the end-Triassic extinction events than benthic invertebrates and reef organisms ( 47 , 48 ). These suffered from a calcification crisis ( 49 ) but formed the food base for the Late Triassic marine reptile groups that went extinct.…”

Section: Discussionmentioning

confidence: 99%

A Triassic plesiosaurian skeleton and bone histology inform on evolution of a unique body plan

et al. 2017

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North American coral recovery after the end-Triassic mass extinction, New York Canyon, Nevada, USA

Cited by 13 publications

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Detrital zircon U-Pb geochronology of the Sierra de Santa Rosa Formation, Sonora, Mexico, and implications for an Early Jurassic retroarc basin

Detrital zircon U-Pb geochronology of the Sierra de Santa Rosa Formation, Sonora, Mexico, and implications for an Early Jurassic retroarc basin

Mercury anomalies and the timing of biotic recovery following the end-Triassic mass extinction

A Triassic plesiosaurian skeleton and bone histology inform on evolution of a unique body plan

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