Results 111 to 120 of about 10,069 (268)

Dinosaur footprints from the Upper Jurassic at Ababuj (Teruel)

open access: yes, 1994
A new dinosaur ichnological site located in the Upper Jurassic of Ababuj (Teruel, Spain) is described, it is formed by at least twenty oval-shaped and five tridactyl-shaped footprints preserved in mudstones with mudcraks, small ripple-marks and breccias.
Martín Escorza, Carlos   +2 more
core  

Geophysical investigation of the Santa Marta impact structure—Piauí State, Brazil

open access: yesMeteoritics &Planetary Science, EarlyView.
Abstract The Santa Marta impact structure in northeastern Brazil, recognized as a partially preserved complex crater, was investigated through an integrated geophysical study employing magnetotelluric (MT) and gravity methods. Our research provides constraints on the crater's subsurface architecture.
Elienara Vasconcelos   +5 more
wiley   +1 more source

Occurrence, origin and possible accumulationsof oil in the SW part of the Carpathian Foredeep (SE Moravia - Czechia) [PDF]

open access: yesActa Montanistica Slovaca, 2006
The drilling exploration in the SW part of the Carpathian Foredeep, in the vicinity of the gas deposit and UGS Dolní Dunajovice encountered the influx of gas, water and oil in Carpathian, Eggenburgian sandstones and Upper Jurassic carbonates.
Pavel Čížek   +2 more
doaj  

Geochemical investigation of impactites from the Boltysh impact structure and possible relationship to early Danian sediments from the Umbria–Marche Basin, Italy

open access: yesMeteoritics &Planetary Science, EarlyView.
Abstract Within the Danian Scaglia Rossa Formation appears a regionally correlatable horizon cutting across multiple sections and outcrops within the Umbria–Marche Basin of NE Italy, where it is intercalated with uniform pelagic carbonate successions. This horizon is called “ALE layer” and has tentatively been interpreted as a fine‐grained volcanic ash.
Toni Schulz   +5 more
wiley   +1 more source

Climate conditions on the South‐Iberian Palaeomargin during the latest Pliensbachian to early Toarcian: A mineralogical and geochemical study from hemipelagic deposits

open access: yesSedimentology, EarlyView.
ABSTRACT The integrated analysis of lithofacies, mineralogy and geochemistry of the hemipelagic marine succession exposed in La Cerradura section (South‐Iberian Palaeomargin) provides new information to characterise the palaeoenvironmental conditions during the latest Pliensbachian to early Toarcian, including the Jenkyns Event.
Chaima Ayadi   +4 more
wiley   +1 more source

Sponge-reef growth and controlling factors (upper Jurassic, southern Germany)

open access: yes, 2002
Olivier Nicolas, Pittet Bernard. Sponge-reef growth and controlling factors (upper Jurassic, southern Germany). In: Documents des Laboratoires de Géologie, Lyon, n°156, 2002. STRATI 2002. 3ème congrès français de stratigraphie. Lyon, 8-10 juillet 2002. p.
Pittet, Bernard, Olivier, Nicolas
core  

The role of bacterial sulfate reduction during dolomite precipitation: Implications from Upper Jurassic platform carbonates

open access: yes, 2015
The early diagenetic formation of dolomite in modern aquatic environments is limited mostly to evaporitic and marine-anoxic, organic-rich sediments dominated by bacterial sulfate reduction (BSR). In such environments, bacterial activity lowers the energy
Leis, A.   +21 more
core   +1 more source

Spatial and temporal evolution of a coastal erg margin: the Middle Jurassic Page Sandstone, southern Utah, USA

open access: yesSedimentology, EarlyView.
ABSTRACT Aeolian deflationary events are erosive to static stages where sediment supply is insufficient to support bedform migration and preservation in the rock record. In the vicinity of shallow‐marine environments, inland rises of relative water table and associated generation of deflationary super surfaces may be driven by the onset of ...
Victor J. P. Hême de Lacotte   +4 more
wiley   +1 more source

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