Amazonia, Landscape and Species Evolution: A Look into the by Carina Hoorn, Frank Wesselingh

By Carina Hoorn, Frank Wesselingh

The e-book makes a speciality of geological historical past because the serious consider identifying the current biodiversity and landscapes of Amazonia. the various riding mechanisms for panorama evolution are explored by means of reviewing the historical past of the Amazonian Craton, the linked sedimentary basins, and the position of mountain uplift and weather switch.

This publication provdes an perception into the Meso- and Cenozoic checklist of Amazonia that used to be characterised by means of fluvial and long-lived lake structures and a hugely diversified natural world. This fauna contains giants resembling the ca. 12 m lengthy caiman Purussaurus, but in addition a various fish fauna and fragile molluscs, when fossil pollen and spores shape relics of ancestral swamps and rainforests.

Finally, a evaluation the molecular datasets of the trendy Amazonian rainforest and aquatic environment, discussing the potential relatives among the foundation of Amazonian species range and the palaeogeographic, palaeoclimatic and palaeoenvironmental evolution of northern South the USA. The multidisciplinary process in comparing the heritage of Amazonia has ended in a finished quantity that offers novel insights into the evolution of this region.

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1991; Colinvaux et al. 2000, 2001; Haffer & Prance 2001; see also Chapter 26) and few geologists were involved in this discussion. g. Salo et al. 1986; Hooghiemstra & Van der Hammen 1998; Lundberg et al. 1998; Lovejoy et al. 1998; Van der Hammen & Hooghiemstra 2000; Nores 2002; Wesselingh and Salo 2006; Tuomisto 2007; Antonelli 2008) yet an undisputed theory about the timing and context of Amazonian diversifications – in the light of geological evidence– still has to materialize. Geology only recently started playing a role in the debate on the origin of biodiversity as it was hampered by the same obstacles as the biological and geomorphological sciences – the lack of firm evidence due to the difficult access to the terrain.

1976). This means that the western Amazon drainage basin, on which this book focuses, is underlain in its entirety by continental crust. As the oldest sediments in the deepest part of the Paleozoic basin system itself are of Ordovician age (Wanderley Filho et al. 2005; see also Chapter 3) the geological history of the Amazonian Craton is essentially restricted to the Precambrian. In predrift reconstructions the Amazonian Craton forms part of western Gondwana. It has its counterpart in western Africa, and southwards and eastwards it continues into other cratonic parts of the South American Platform (Fig.

75 Ga. We argue that previous continental accretion models based on progressively younger granite ages westwards have to be revised in view of new geochronological data. Little-deformed sandstone platforms unconformably overlying older basement are widespread, and have been deposited in different episodes of post-orogenic basin formation from the Archean down to the Phanerozoic. Mafic dykes of Proterozoic to Permo-Triassic age testify to various phases of extension, rifting and basin formation, including the formation of the Paleozoic basin system and the later Amazon drainage basin itself.

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