Carbon isotope stratigraphy and depositional oxia through Cenomanian/Turonian boundary sequences (Upper Cretaceous) in New Zealand

Fossil-wood carbon-isotope stratigraphy of the non-marine Wealden Group (Lower Cretaceous, southern England)

Fossil-wood carbon-isotope data are presented for the Wessex Formation, a non-marine unit within the Lower Cretaceous (Valanginian–Barremian) Wealden Group of the Isle of Wight and Dorset, southern England. The carbon-isotope values have a range ( C c. 26.6 to 19.8‰) that is consistent with that expected for Mesozoic C3 plants. Consideration of the Isle of Wight fossil-wood carbon-isotope data ...

Carbon Isotope Excursion in Atmospheric CO2 at the Cretaceous-Tertiary Boundary: Evidence from Terrestrial Sediments

A 1.5‰ to 2‰ carbon isotope excursion immediately above the clay layer that defines the Cretaceous-Tertiary (K/ T) boundary has been reported in marine sediments world wide. This paper reports a similar 1.5‰ to 2.8‰ carbon isotope excursion recorded by C3 land plants from three temporally-controlled, stratigraphically-constrained terrestrial sections in the Western Interior of North America (Ga...

Depositional environment, diagenesis, sequence stratigraphy and geochemistry of Lower Cretaceous carbonate unit (K1) of Kuh-khangormas, Tuyserkan (Sanandaj-Sirjan Zone)

Abstract Lower Cretaceous carbonate units of the Kuhzation, karstification and dolomitization, studies of 40 samples of these carbonate units indicated aragonite as original mineralogy in closed to semi-closed diagenetic system.

Stratigraphy of the Castlecliffian type section: 10 mid-Pleistocene sequences from the Wanganui coast, New Zealand

The 160 m thick Castlecliff coast section was deposited during the middle Pleistocene (c. 1.07-0.35 Ma) and comprises 10 disconformity-bound cyclothems or sequences. A typical sequence has three parts: (1) a basal suite of shoreface and inner shelf sediments with intertidal and shallow subtidal molluscan faunas, and cross-bedded, pebbly shell gravels (type A shellbeds); (2) a mid-cycle shellbed...

Mineralogic Stratigraphy and Depositional Environment in Miyamoto Crater,