Palynology of the Middle to Late Miocene from ODP Hole 175-1085A off the west coast of South Africa

Aim To test whether the radiation of the extremely rich Cape flora is correlated with marine-driven climate change. Location Middle to Late Miocene in the south-east Atlantic and the Benguela Upwelling System (BUS) off the west coast of South Africa. Methods We studied the palynology of the thoroughly dated Middle to Late Miocene sediments of Ocean Drilling Program (ODP) Site 1085 retrieved from the Atlantic off the mouth of the Orange River. Both marine upwelling and terrestrial input are recorded at this site, which allows a direct correlation between changes in the terrestrial flora and the marine BUS in the south-east Atlantic. Results Pollen types from plants of tropical affinity disappeared, and those from the Cape flora gradually increased, between 10 and 6 Ma. Our data corroborate the inferred dating of the diversification in Aizoaceae c. 8 Ma. Main conclusions Inferred vegetation changes for the Late Miocene south-western African coast are the disappearance of Podocarpus-dominated Afromontane forests, and a change in the vegetation of the coastal plain from tropical grassland and thicket to semi-arid succulent vegetation. These changes are indicative of an increased summer drought, and are in step with the development of the southern BUS. They pre-date the Pliocene uplift of the East African escarpment, suggesting that this did not play a role in stimulating vegetation change. Some Fynbos elements were present throughout the recorded period (from 11 Ma), suggesting that at least some elements of this vegetation were already in place during the onset of the BUS. This is consistent with a marine-driven climate change in south-western Africa triggering substantial radiation in the terrestrial flora, especially in the Aizoaceae.

West Coast of Africa, 1745 (Raster Image)

This layer is a georeferenced raster image of the historic paper map entitled: A draught of the coast of Africa from the streights-mouth to Cape Bona-Esprance. It was published by E. Say in 1745. Scale [ca. 1:19,000,000]. The image inside the map neatline is georeferenced to the surface of the earth and fit to the Africa Lambert Conformal Conic projected coordinate system. All map collar and inset information is also available as part of the raster image, including any inset maps, profiles, statistical tables, directories, text, illustrations, index maps, legends, or other information associated with the principal map. This map shows features such as drainage, cities and other human settlements, territorial boundaries, shoreline features (ports, shoals), and more. Shows trading posts by national claim.This layer is part of a selection of digitally scanned and georeferenced historic maps from the Harvard Map Collection. These maps typically portray both natural and manmade features. The selection represents a range of originators, ground condition dates, scales, and map purposes.

Memoirs and services of the Eighty-third regiment, county of Dublin, from 1793 to 1907, including the campaigns of the regiment in the West Indies, Africa, the Peninsula, Ceylon, Canada, and India.

This Memoir ... was originally arranged and prepared for publication from September, 1793 ... to September, 1863, by Brevet Major Edward William Bray ... The later history ... has been collected from the Authentic Records preserved in the Regimental Orderly Room.

The agricultural situation in Africa and West Asia.

Includes review of past year and outlook for current year.

The ... Africa and West Asia agricultural situation.

Title from cover.

The marine practice of physic and surgery : including that in the hot countries, particulary useful to all who visit the east and west Indies, or the coast of Africa, to which is added Pharmacopoeia marina ... /

Mode of access: Internet.

The marine practice of physic and surgery : including that in the hot countries, particulary useful to all who visit the east and west Indies, or the coast of Africa, to which is added Pharmacopoeia marina ... /

Contiene con pag. propia : Pharmacopoeia marina in usum regii classis britannici.

U.S. agricultural trade with west Asia and Africa /

Chiefly tables.

Africa and the West; elements of free-world policy.

Mode of access: Internet.

Supplement to H[ydrographic] O[ffice publication] no. 261. Naval air pilot, West Central Africa (including Cape Verde, Ascension, and St. Helena Islands); weather summary.

Mode of access: Internet.