Géomorphologie et géomorphogenèse comparées des bourrelets marginaux brésiliens et angolais
type: Dataset
description: This work tries to bring explanations to genesis and evolution of the reliefs bordering the South central Atlantic, in Angola and Brazil. According to this purpose, it finds back the major stages of the morphologie evolution for the three great unities and draws up a synoptic list of them, which allow: the following conclusions l -The Relief modifications on land and at sea have been absolutely synchronous during the Cretaceous, partially during the Tertiary, when both "swells" are only affected by the same strong beats. 2 -Marginal swells have been rhythmically heaved in Neocomian-Aptian, Turono-Senonian, Oligocene, Pleistocene-Holocene. The upheavals were unequal leading to under and over-raised parts. 3 -The terracing of erosion surfaces, present everywhere although unequally, arises from this rythmic upheaval as well as from the evolution of forms under a climate whose basic trend was -to the semi-arid, shaping pediplain. The morphologic evolutions are thus liable to be interpreted as balance-sheets 4 -Swells have been strongly standing out as major reliefs since the lower Cretaceous with certainty, that is to say, since the unquestionable opening of the South Central Atlantic. Topographic~ permanence, synchronism of evolution require explanations whose value is global. Under and over-raised parts of swells, morphologic dive:. fication demand elucidations of local, regional scope. -The topographic permanence arises from : thermal heritages, juxtaposition of oceanic and continental lithosphere. - The thermal heritage is twofold, resulting from the tectono-thermal event (late Precambrian) and from the splitting of the gondwanian continent (lower Cretaceous). The continental litho-sphere building the swells was thermically outbalanced, heated such is not the case with the one which is to bi found inland, denser. - The swells locate the contact between oceanic and continental lithosphere. The first one cools and subsides, whereas one speaks of thermal inertia for th…
landing page: https://theses.hal.science/tel-00691634
keyword: angola
keyword: bresil
keyword: geomorphologie
keyword: infoeu-reposemanticsdoctoralthesis
keyword: sdeenvironmental-sciences
keyword: shsgeohumanities-and-social-sciencesgeography
keyword: theses
issued: 2026-05-20T17:04:10.501040
modified: 2026-05-20T17:04:10.501046
language: fr
contact point: Organization
  fn: CCSD

test_moissonnage_selune
type: Agent

Géomorphologie et géomorphogenèse comparées des bourrelets marginaux brésiliens et angolais
type: Distribution
format: HTML
access URL: https://theses.hal.science/tel-00691634
issued: 2026-05-20T17:04:10.512053
modified: 2026-05-20T17:04:10.481670