7 documents found, page 1 of 1

Faciologia e evolução dos depósitos eólicos costeiros do oeste do Ceará (Brasil...

This study aimed to characterize the morphology and evolution of coastal deposits in western Ceará state based on the variation of the sea level in the Late Holocene, thus reconstructing the paleogeography of the area. Based on the petrography and facies analysis, fi ve sedimentary facies and their original depositional forms (facies associations) have been identifi ed as follows: coarse-grained sandstone with ...

Fraturas, carste e cavernas nos calcários Jandaíra em Felipe Guerra, Rio Grande...

Structural and geological conditions were studied to evaluate their influence on the control and evolution of karst features in Cretaceous carbonates of the Jandaíra Formation. The investigated area was the Arapuá limestone outcrop located in the municipality of Felipe Guerra, western part of the Potiguar Basin. The structural arrangement of the fractures shows the existence of four families with preferential s...

Seismogenic faulting in the Meruoca granite, NE Brazil, consistent with a local...

A sequence of earthquakes occurred in 2008 in the Meruoca granitic pluton, located in the northwestern part of the Borborema Province, NE Brazil. A seismological study defined the seismic activity occurring along the seismically-defined Riacho Fundo fault, a 081° striking, 8 km deep structure. The objective of this study was to analyze the correlation between this seismic activity and geological structures in t...

Geophysical evidence of pre-sag rifting and post-rifting fault reactivation in ...

This study investigated the rifting mechanism that preceded the prolonged subsidence of the Paleozoic Parnaíba basin in Brazil and shed light on the tectonic evolution of this large cratonic basin in the South American platform. From the analysis of aeromagnetic, aerogravity, seismic reflection and borehole data, we concluded the following: (1) large pseudo-gravity and gravity lows mimic graben structures but a...

Late Oligocene–Miocene transgressions along the equatorial and eastern margins ...

Texto completo. Acesso restrito. p. 87–112; Submitted by Santiago Fabio (fabio.ssantiago@hotmail.com) on 2013-10-15T17:11:40Z No. of bitstreams: 1 aaaazs.pdf: 41210 bytes, checksum: ee00930f59f7591f66c75569d8cb3e4d (MD5); Approved for entry into archive by Rodrigo Meirelles (rodrigomei@ufba.br) on 2013-10-30T16:41:21Z (GMT) No. of bitstreams: 1 aaaazs.pdf: 41210 bytes, checksum: ee00930f59f7591f66c75569d8cb3e4d...

Late Pleistocene marine terrace deposits in northeastern Brazil: sea-level chan...

p. 57-69; Submitted by Ana Valéria de Jesus Moura (anavaleria_131@hotmail.com) on 2012-01-12T17:38:03Z No. of bitstreams: 1 s2.0-S0031018201004084-main.pdf: 816432 bytes, checksum: 929debe8ab08419af07242b0c3a544db (MD5); Made available in DSpace on 2012-01-12T17:38:03Z (GMT). No. of bitstreams: 1 s2.0-S0031018201004084-main.pdf: 816432 bytes, checksum: 929debe8ab08419af07242b0c3a544db (MD5) Previous issue date:...

Novos dados geológicos e geofísicos para a caracterização geométrica e estratig...