Late Mesozoic and Cenozoic stratigraphy and geological history of the South Atlantic high latitudes

Late Cretaceous palaeoenvironments and biotas: an Antarctic perspective

“…Howlett 1989, fig. 4), planktic and benthic foraminifera (Krasheninnikov & Basov 1986, Sliter 1976) and calcareous nannoplankton (Thierstein 1974); the boundaries of this marine province are latitudinally similar to those of the podocarp-araucarian coniferous forests ( The principal Late Cretaceous fossiliferous exposure on King George Island occurs within the Zamek Formation of Admiralty Bay (62"s) (Figs 1 & 2). This 40 m-thick unit comprises basaltic andesite lavas, scoria and thin tuff seams, at least one of which contains a rich assemblage of fossil leaves (Birkenmajer & Zastawniak 1989a,b).…”

“…It is apparent that many austral biotas are of demonstrably lower taxonomic diversity than their lower latitude counterparts. Perhaps the best evidence for this comes from planktic foraminifera, of which there are over 60 Campanian-Maastrichtian species known from the tropical Tethyan province but only 14-20 from the cool-temperate austral one (Sliter 1976, Krasheninnikov & Basov 1986, Huber 1988). Similar steep temperate-tropical diversity gradients have been calculated for Late Cretaceous bivalve genera (Kauffman 1973) and estimated for angiosperm taxa (frompalynological data; e.g.…”

Paleobiogeografía y paleogeografía del Maastrichtiense Marino de la Patagonia, Tierra del Fuego y la plataforma continental Argentina, según sus foraminíferos bentónicos

“…La apreciación del carácter austral de las faunas patagónicas se remonta a los primeros estudios de invertebrados de fines del siglo XIX, y al comienzo del estudio sistemático de los foraminíferos cretácicos en la Argentina (Malumián & Masiuk, 1973), que notaron los vínculos con Nueva Zelanda, Australia y Antártida. Entre las primeras referencias, los neocelandeses reconocieron los elementos paleoaustrales integrantes de un centro o región endémico (Fleming, 1962;Stevens, 1980), que Kauffman (1973), para el Maastrichtiense, dividió en dos subprovincias; Scheibnerová (1971Scheibnerová ( , 1973, Sliter (1977), Zinsmeister (1979), Krasheninnikov & Basov (1986), lo elevaron a nivel de provincia, y Huber (1992a,b; 1994) lo consideró un reino. En el extremo austral de América del Sur, se reconoce la misma situación señalada para Australasia por McGowran (1978): las asociaciones son provinciales, pero con "ventanas" provistas por excursiones desde los trópicos, que dan una idea de las variaciones climáticas (Malumián & Náñez, 1996).…”

Miocene decapod crustacean faunas from Cyprus – Part 1. Geographical-stratigraphical setting and Anomura

“…Outcrops of this unit comprise mostly evaporites and are located within synclinal structures, south-west of the Troodos Massif, for instance in the Polemi, Pissouri, Mesaoria and Psematismenos basins (Orszag-Sperber et at., 1989;Robertson et al, 1995). Krasheninnikov and Kaleda (1994) noted an evaporitic sequence of the Kalavasos Formation with three distinct members near the village of Pissouri, which is typical of other localities in Cyprus and the Mediterranean region as a whole. These members comprised a lower unit of marls and diatomites, with intercalated limestone beds, a middle unit of fine-grained, bedded to coarse crystalline gypsums, with a polygenetic breccia at the base and a gypsiferous breccia within the member, and an upper unit comprising intercalated conglomerates/breccias, limestone and marls, in lens-shaped layers of variable thickness.…”