Results 141 to 150 of about 71,903 (304)

Determining impact angle from the spatial distribution of shock metamorphism: A case study of the Gosses Bluff (Tnorala) impact structure, Australia

open access: yesMeteoritics &Planetary Science, EarlyView.
Abstract The majority of planetary impacts occur at oblique angles. Impact structures on Earth are commonly eroded or buried, rendering the identification of the direction and angle of impact—using methods such as asymmetries in ejecta distribution, surface topographic expression, central uplift structure, and geophysical anomalies—challenging. In this
Eloise E. Matthews   +5 more
wiley   +1 more source

Systematics and Phylogenetic Interrelationships of the Enigmatic Late Jurassic Shark <i>Protospinax annectans</i> Woodward, 1918 with Comments on the Shark-Ray Sister Group Relationship. [PDF]

open access: yesDiversity (Basel), 2023
Jambura PL   +12 more
europepmc   +1 more source

The effect of early diagenetic processes on the quantification of fossil micrometeorite abundance and flux in the geological record

open access: yesMeteoritics &Planetary Science, EarlyView.
Abstract Fossil micrometeorites (MMs) recovered from lithified sedimentary rocks, particularly iron‐rich (I‐type) cosmic spherules (CSs) provide valuable insights into past dust‐forming events. Their abundances, when combined with estimates of local sedimentation rates can be used to reconstruct the flux of extraterrestrial dust.
Isabelle S. Mattia   +2 more
wiley   +1 more source

Paleomagnetic Constraints on the Rapid Plate Shift of North China Block During the Jurassic From ∼155 Ma Dykes and Sills

open access: yesGeochemistry, Geophysics, Geosystems
A large‐scale apparent polar wander occurred during the Jurassic interval, which is interpreted as true polar wander (TPW). As the motion is nearly orthogonal to the TPW axis, the North China Block (NCB) experienced the largest latitudinal and ...
Pengfei Wang   +7 more
doaj   +1 more source

Petroleum geology of the Upper Jurassic – Lower Cretaceous of East and North-East Greenland: Blokelv-1 borehole, Jameson Land Basin: Burial and exhumation history of the Jameson Land Basin, East Greenland, estimated from thermochronological data from the Blokelv-1 core (including Appendix) [PDF]

open access: yesGeological Survey of Denmark and Greenland Bulletin, 2018
Apatite fission-track analysis (AFTA) data in two Upper Jurassic core samples from the 231 m deep Blokelv-1 borehole, Jameson Land, East Greenland, combined with vitrinite reflectance data and regional AFTA data, define three palaeo-thermal episodes.
Paul F. Green, Peter Japsen
doaj  

No legacy effects of severe drought on carbon and water fluxes in a Mediterranean oak forest

open access: yesPlant Biology, EarlyView.
A Mediterranean Quercus ilex forest was severely affected by a drought in 2017 but fully recovered in the following year, supported by favourable weather and growing conditions both before and after the event. Abstract Severe droughts affect vegetation through several processes, such as hydraulic failure, early leaf senescence, depletion of carbon ...
S. Heinrich   +8 more
wiley   +1 more source

Two emetolite-pterosaur associations from the Late Jurassic of China: showing the first evidence for antiperistalsis in pterosaurs. [PDF]

open access: yesPhilos Trans R Soc Lond B Biol Sci, 2022
Jiang S   +6 more
europepmc   +1 more source

Microbial mats in dinosaur ichnocoenoses

open access: yesSedimentology, EarlyView.
ABSTRACT Until now, the significance of microbial mats in preservation of dinosaur tracks and in reconstructing the palaeoenvironment in which dinosaurs roamed was rarely studied. Dinosaur tracks are commonly found close to ancient aquatic bodies where moist sediment had once allowed footstep registration.
Nora Noffke   +3 more
wiley   +1 more source

A derived dryolestid mammal indicates possible insular endemism in the Late Jurassic of Germany. [PDF]

open access: yesNaturwissenschaften, 2021
Martin T   +4 more
europepmc   +1 more source

The stratigraphy of the Penarth Group (Late Triassic) of the East Devon coast [PDF]

open access: yes, 2008
The cliff and foreshore exposures in the Devon part of the Dorset and East Devon Coast World Heritage Site expose an unbroken late Triassic to early Jurassic succession.
Gallois, Ramues W
core  

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