Stratigraphic transitions from the Triassic to the Jurassic (Tr-J) around 200 Ma record an abrupt extensive global collapse and slow recovery of biodiversity, the cause of which has been tied to a massive abrupt, extrinsically caused climate change (Ward et al., 2001; Hesselbo et al., 2002). The main thrust of the proposed research will be to reconstruct Tr-J paleo-atmospheric CO2, suggested to...

The Hemse Group is one of the least understood stratigraphic units Silurian sequence Gotland, Sweden. New results from airborne transient electromagnetic (ATEM) measurements in combination with previously published data field studies and geophysical investigations shed new light on carbonate platform development during early- to mid-Ludlow Group. ATEM reveals a transgressive phase that began ne...

The geologic sequestration of carbon dioxide (CO2) in structural and stratigraphic 9 traps is a viable option to reduce anthropogenic emissions. While dissolution of the 10 CO2 stored in these traps reduces the long-term leakage risk, the dissolution process 11 remains poorly understood in systems that reflect the appropriate subsurface geometry. 12 Here, we study dissolution in a porous layer ...

The Oligocene to Quaternary succession encountered in CRP-2/2A is divided into twelve recurrent lithofacies (some of which have been subdivided further), reflecting a range of marine, glacimarine and possibly subglacial environments of sediment accumulation. A cyclical vertical arrangement of lithofacies was noted throughout the core, and is used as the basis for a sequence stratigraphic analys...

Geological maps have wide coverage with low acquisition difficulty. When other geological survey data are scarce, they a valuable source of structure information for modeling. However, structures large deformation, map has difficulty meeting the requirement its 3D Therefore, this paper takes dome as an example to explore modeling method based on maps, DEM and related knowledge. The includes: (1...

The Nama Group exposed on the Neint Nababeep Plateau along Orange River in northwestern Republic of South Africa is now recognized as an expanded record Ediacaran-Cambrian transition that provides opportunity for integrated stratigraphic approach examining geochemical and biologic evolution across this fundamental geologic boundary at unprecedented resolution. U-Pb zircon geochronology by CA-ID...

The probability that two stratigraphic events are in a particular order in a section in which they occur in sequence is p. Because of finite sampling, statistical techniques are used to calculate the parameters p' and p(l), which express the uncertainty of our knowledge of p; p' is the measured value of the maximum likelihood estimator of p and p(l) is the lower end point of the confidence inte...

Species of Nannirhynchia Buckman, 1918 are particularly abundant in the stratigraphic record of Early Jurassic age outcropping in the Lusitanian Basin, where they represent important biostratigraphic tools, especially where ammonites are missing or are not well preserved. An attempt of a correlation scheme of ammonite and brachiopod zones from the Mediterranean and the northern European provinc...