The fossil record of early vertebrates has been influential in elucidating the evolutionary assembly of the gnathostome bodyplan. Understanding of the timing and tempo of vertebrate innovations remains, however, mired in a literal reading of the fossil record. Early jawless vertebrates (ostracoderms) exhibit restriction to shallow-water environments. The distribution of their stratigraphic occu...

Re ection patterns play an important role in seismic sequence stratigraphy, therefore making their quantitative description essential for the construction and validation of sequence stratigraphic models from seismic data. The characteristics of a seismic re ection pattern can be elicited from the data by representing the data as a joint function of time and frequency. Developments in the eld of...

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...

Abstract A relatively complete conodont record from Famennian to the Mississippian/Pennsylvanian boundary was investigated in Anarak section, Central Iran. The studied interval belongs Bahram, Shishtu, Ghaleh and Absheni formations. part of section (Bahram Formation) ranges Palmatolepis triangularis Zone into Bispathodus ultimus Zone. Not all zones could be defined due lack indicative species. ...

editorial standards or with the North American Stratigraphic Code. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.

Permian stratigraphic sequences are widely distributed throughout Iranian, making this one of the best locations in the world to study15 this geological time interval. Nevertheless, some units lack detailed biostratigraphic characterization which is essential for16 palaeogeographic reconstructions. This preliminary study comprises a palynological assessment of a Permian stratigraphi...

This article compiles data on the Devonian-Carboniferous Boundary successions from countries and regions, which have not been dealt with separately in this special issue. Data derive different palaeocontinents a large palaeoclimatic gradient southern high latitudes of western Gondwana through palaeotropics into temperate/boreal northern Siberia. The quality is variable, but often surprisingly g...