This work uses high-quality reprocessed 2D data, tied to borehole information, address the development of North Atlantic Jurassic seaways on continental margin West Iberia. The seismic data reveal full thickness Mesozoic syn-rift strata filling deep-offshore basins in this latter region. Tectonic subsidence resulted separation seaway into distal and proximal sectors. As a result, backstripped c...

Core samples from Middle Silurian pinnacle reefs in northern Michigan exhibit a regionally consistent assemblage of late diagenetic phases including geopetal diagenetic sediment, disseminated pyrite, pyrobitumen, rhombic dolomite cement, and equant calcite spar. High (>80°C) fluid inclusion homogenization temperatures and inclusions of Silurian-sourced oil in these diagenetic phases indicate th...

Abstract This contribution is an overview of the Early Jurassic dinoflagellate cysts Lusitanian Basin in Portugal, with particular emphasis on effects Jenkyns Event (Toarcian Oceanic Anoxic Event) evolution this planktonic group. We review and discuss data from 214 samples six Lower successions (upper Sinemurian to upper Toarcian) Basin. The late Pliensbachian radiation was well recognized basi...

We characterised the organic matter content of marine deposits at Oxfordian–Kimmeridgian transition in Boulonnais (France). Organic rich platform environments are evidenced uppermost Cymodoce and lowermost Mutabilis Zone (early late Kimmeridgian), associated with enhanced planktonic palaeoproductivity and/or developing dysoxia/anoxia. Similar intervals early Kimmeridgian also Normandy Charentes...

The North China Craton (NCC) was stable for more than 2.0 Gyr before a Jurassic–Cretaceous large-scale lithospheric thinning event, but the geodynamic setting during early phases (Late Jurassic) of NCC reworking remains controversial. We present new petrological and whole-rock geochemical data, zircon apatite geochemistry, U–Pb ages, O isotopic Sr–Nd data two Late Jurassic granite (Linglong Lua...

Early Jurassic U-Pb age is obtained for both foliated and undeformed granites on Horseshoe Island, Antarctic Peninsula. Some microstructures in the granites/orthogneisses indicate high-temperature greenschist or low- to medium-temperature amphibolite facies deformation conditions. Additionally, a Late Cretaceous yielded gabbro intruding deformed granitoids.

Upper Jurassic strike-slip intra-arc basins formed along the axis of earlier Lower to Middle Jurassic extensional intra-arc basins in Arizona. These strike-slip basins developed along the Sawmill Canyon fault zone, which may represent an inboard strand of the Mojave-Sonora megashear system that did not necessarily produce large-scale translations. Subsidence in the Lower to Middle Jurassic exte...

BACKGROUND The Middle Jurassic was a critical time in the evolutionary history of ichthyosaurs. During this time interval, the diverse, well-studied faunas of the Lower Jurassic were entirely replaced by ophthalmosaurids, a new group that arose sometime prior to the Aalenian-Bajocian boundary and by the latest middle Jurassic comprised the only surviving group of ichthyosaurs. Thus, the Middle ...