Dataset Information

Gravity field of the Orientale basin from the Gravity Recovery and Interior Laboratory Mission.

ABSTRACT: The Orientale basin is the youngest and best-preserved major impact structure on the Moon. We used the Gravity Recovery and Interior Laboratory (GRAIL) spacecraft to investigate the gravitational field of Orientale at 3- to 5-kilometer (km) horizontal resolution. A volume of at least (3.4 ± 0.2) × 106 km3 of crustal material was removed and redistributed during basin formation. There is no preserved evidence of the transient crater that would reveal the basin's maximum volume, but its diameter may now be inferred to be between 320 and 460 km. The gravity field resolves distinctive structures of Orientale's three rings and suggests the presence of faults associated with the outer two that penetrate to the mantle. The crustal structure of Orientale provides constraints on the formation of multiring basins.

SUBMITTER: Zuber MT

PROVIDER: S-EPMC7462089 | biostudies-literature | 2016 Oct

REPOSITORIES: biostudies-literature

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Gravity field of the Orientale basin from the Gravity Recovery and Interior Laboratory Mission.

Zuber Maria T MT Smith David E DE Neumann Gregory A GA Goossens Sander S Andrews-Hanna Jeffrey C JC Head James W JW Kiefer Walter S WS Asmar Sami W SW Konopliv Alexander S AS Lemoine Frank G FG Matsuyama Isamu I Melosh H Jay HJ McGovern Patrick J PJ Nimmo Francis F Phillips Roger J RJ Solomon Sean C SC Taylor G Jeffrey GJ Watkins Michael M MM Wieczorek Mark A MA Williams James G JG Jansen Johanna C JC Johnson Brandon C BC Keane James T JT Mazarico Erwan E Miljković Katarina K Park Ryan S RS Soderblom Jason M JM Yuan Dah-Ning DN

Science (New York, N.Y.) 20161027 6311

The Orientale basin is the youngest and best-preserved major impact structure on the Moon. We used the Gravity Recovery and Interior Laboratory (GRAIL) spacecraft to investigate the gravitational field of Orientale at 3- to 5-kilometer (km) horizontal resolution. A volume of at least (3.4 ± 0.2) × 10<sup>6</sup> km<sup>3</sup> of crustal material was removed and redistributed during basin formation. There is no preserved evidence of the transient crater that would reveal the basin's maximum volu ...[more]

PMID: 27789835

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Project description:BackgroundTroodontids are a predominantly small-bodied group of feathered theropod dinosaurs notable for their close evolutionary relationship with Avialae. Despite a diverse Asian representation with remarkable growth in recent years, the North American record of the clade remains poor, with only one controversial species--Troodon formosus--presently known from substantial skeletal remains.Methodology/principal findingsHere we report a gracile new troodontid theropod--Talos sampsoni gen. et sp. nov.--from the Upper Cretaceous Kaiparowits Formation, Utah, USA, representing one of the most complete troodontid skeletons described from North America to date. Histological assessment of the holotype specimen indicates that the adult body size of Talos was notably smaller than that of the contemporary genus Troodon. Phylogenetic analysis recovers Talos as a member of a derived, latest Cretaceous subclade, minimally containing Troodon, Saurornithoides, and Zanabazar. MicroCT scans reveal extreme pathological remodeling on pedal phalanx II-1 of the holotype specimen likely resulting from physical trauma and subsequent infectious processes.Conclusion/significanceTalos sampsoni adds to the singularity of the Kaiparowits Formation dinosaur fauna, which is represented by at least 10 previously unrecognized species including the recently named ceratopsids Utahceratops and Kosmoceratops, the hadrosaurine Gryposaurus monumentensis, the tyrannosaurid Teratophoneus, and the oviraptorosaurian Hagryphus. The presence of a distinct troodontid taxon in the Kaiparowits Formation supports the hypothesis that late Campanian dinosaurs of the Western Interior Basin exhibited restricted geographic ranges and suggests that the taxonomic diversity of Late Cretaceous troodontids from North America is currently underestimated. An apparent traumatic injury to the foot of Talos with evidence of subsequent healing sheds new light on the paleobiology of deinonychosaurians by bolstering functional interpretations of prey grappling and/or intraspecific combat for the second pedal digit, and supporting trackway evidence indicating a minimal role in weight bearing.

Dataset Information

Gravity field of the Orientale basin from the Gravity Recovery and Interior Laboratory Mission.

Publications

Gravity field of the Orientale basin from the Gravity Recovery and Interior Laboratory Mission.

Similar Datasets

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