The Concentration-Area (C-A) method is applied to geochemical map patterns satisfying the model of De Wijs. Results derived for the spatial distribution of gold in altered Jurassic volcanic rocks in the MitchellSulphurets area of northwestern British Columbia confirm earlier multifractal modelling. However, the possibility of departures from the Pareto-type upper tail model of the frequency dis...

Abstract The ChaoShan Depression is the largest Mesozoic depression covering an area of 3.7 x 10 4 km 2 where relict strata are up to 5000 m thick. It has experienced disruption since late Mesozoic. In early survey, oil-gas migration condition and reservoiring mechanism poorly expounded from Meso-Cenozoic tectonic superposition due poor seismic imaging deep layers. New surveys using long stream...

A remarkable specimen of Mesolimulus from the Upper Jurassic (Kimmeridgian) of Nusplingen, Germany, preserves the musculature of the prosoma and associated microbes in three dimensions in calcium phosphate (apatite). The musculature of Mesolimulus conforms closely to that of modern horseshoe crabs. Associated with the muscles are patches of mineralized biofilm with spiral and coccoid forms. Thi...

Middle Jurassic radiolarians have been recovered from the western Pacific for the first time. The oldest faunas are assigned to the middle and upper Tricolocapsa conexa Zone, indicating a Bathonian/Callovian age. The faunas contain more than 30 species and are characterized by an abundance of small nassellarians with a constricted distal end. The faunas compare well with Tethyan faunas, and are...

A paleomagnetic study of rocks from the northern foot of the Tien Shan and the southern border of the Dzungar Basin, east of Urumqi (44.2°N, 86.0°E), spanning ages from middle Jurassic to early Tertiary was carried out to constrain the tectonic evolution in central Asia since Mesozoic time. Five middle Jurassic sites reveal a remagnetized direction close to the present Earth field in geographic...

Abundant new ichthyosaur material has recently been documented in the Slottsmøya Member of the Agardhfjellet Formation from the Svalbard archipelago of Norway. Here we describe a partial skeleton of a new taxon, Janusaurus lundi, that includes much of the skull and representative portions of the postcranium. The new taxon is diagnosed by a suite of cranial character states including a very grac...

SYNOPSIS Suuwassea emilieae is a recently described dinosaur taxon discovered in the Upper JurassicMorrisonFormationof thewesternUnitedStatesand theonlynon-diplodocidflagellicaudatan (Dinosauria: Sauropoda) known fromNorth America. It retains sauropod symplesiomorphies that are unexpected in a Late Jurassic taxon and thus sheds light on the evolutionary origins of the Flagellicaudata. Despite b...

BACKGROUND The early evolution of sauropod dinosaurs is poorly understood because of a highly incomplete fossil record. New discoveries of Early and Middle Jurassic sauropods have a great potential to lead to a better understanding of early sauropod evolution and to reevaluate the patterns of sauropod diversification. PRINCIPAL FINDINGS A new sauropod from the Middle Jurassic of Niger, Spinop...