Banca de DEFESA: MARIA EMANUELLA FIRMINO BARBOSA

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
DISCENTE : MARIA EMANUELLA FIRMINO BARBOSA
DATA : 05/09/2017
HORA: 08:30
LOCAL: Auditório do Departamento de Geofísica
TÍTULO:

Tectonics and sedimentation Neogene - Quaternary in the coastal plain of the Assu river, Potiguar Basin

PALAVRAS-CHAVES:

Holocene transgression, neotectonics, sandy shores, beachrock, sea-level change

PÁGINAS: 180
GRANDE ÁREA: Ciências Exatas e da Terra
ÁREA: Geociências
RESUMO:

A detailed geomorphological survey using Light Detection and Ranging was carried out along the western part of Assu River, NE, Brazil. The study was complemented by a series of shallow boreholes, sediment benthic foraminifera indicators, as well as radiocarbon and optically stimulated luminescence dating and permitted to reconstruct the evolution of this area from the late Pleistocene until the present. The shallow embayment, which is now completely infilled formed within the limits of antecedent morphology developed since the last interglacial. The main forcing factors responsible for repositioning of the shoreline, which ran at an angle of ca. 35% to the present coast in Early/mid Holocene were: (1) tectonic activity along Afonso Bezerra a strike-slip fault line which defines the horst-graben structure of Mel dome, (2) fast inundation of the shallow paleovalley embayment during the last pulse of Holocene transgression ca. 7500 cal BP, and (3) fast progradation of the Assu estuary through accretion of coastal drift and fluvial sediments. 

MEMBROS DA BANCA:
Externo à Instituição - CARLOS CÉSAR UCHÔA DE LIMA - UEFS
Presidente - 350640 - FRANCISCO HILARIO REGO BEZERRA
Interno - 2218779 - HELENICE VITAL
Externo à Instituição - SÉRGIO VIEIRA FREIRE BORGES - IFRN
Externo à Instituição - WELLINGTON FERREIRA DA SILVA FILHO - UFC