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Geosciences, Volume 12, Issue 6

June 2022 - 36 articles

Cover Story: In northern Peru, the middle Miocene paleosols of the Sambimera Formation archive the environmental conditions of the Bagua Basin prior to the uplift of the Eastern Cordillera depicted in the background. Today, the Eastern Cordillera casts a rain shadow effect on the low-level trade winds traveling from the Atlantic, driving the dry environmental conditions of the basin. This study presents oxygen and carbon stable isotope results that constrain the establishment of the Eastern Cordillera as an orographic barrier for the trade winds sometime after ~13 Ma. View this paper
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Articles (36)

  • Article
  • Open Access
10 Citations
4,364 Views
24 Pages

In anisotropic materials such as minerals and rocks, the AC magnetic susceptibility is also anisotropic, and consists of two components, one in-phase with the applied field (ipMS) and the other out-of-phase (opMS). Correspondingly, anisotropies of th...

  • Article
  • Open Access
5 Citations
2,553 Views
28 Pages

Calcite twinning is a dominant deformation mechanism at low temperatures. It is often used to reconstruct paleostresses: orientations of the principal stress axes, stress ratios and differential stress. Despite numerous studies, on single crystals an...

  • Article
  • Open Access
7 Citations
4,445 Views
17 Pages

Numerical simulations were generated using a nonlinear shallow-water model of velocity potential to study the fundamental processes of tsunami generation and amplification by atmospheric pressure waves. When an atmospheric pressure wave catches up wi...

  • Article
  • Open Access
21 Citations
4,958 Views
27 Pages

Constraining the Timing of Evolution of Shear Zones in Two Collisional Orogens: Fusing Structural Geology and Geochronology

  • Rodolfo Carosi,
  • Chiara Montomoli,
  • Salvatore Iaccarino,
  • Beatriz Benetti,
  • Alessandro Petroccia and
  • Matteo Simonetti

In recent decades, constraining the timing of shear activity has been one of the main topics of research about the tectono-metamorphic evolution of orogenic belts. We present a review of a combined structural and geochronological approach to two majo...

  • Article
  • Open Access
12 Citations
4,707 Views
28 Pages

The approximately 2 km thick fluvio-lacustrine deposits of Pranhita-Godavari Gondwana syn-rift basin, ranging in age from 235 to 196 Ma, track the compositional changes from the Middle Triassic to Early Jurassic. Mineralogical and geochemical investi...

  • Article
  • Open Access
28 Citations
5,437 Views
35 Pages

Variation of Fe, Al, and F Substitution in Titanite (Sphene)

  • Bart J. Kowallis,
  • Eric H. Christiansen,
  • Michael J. Dorais,
  • Anthony Winkel,
  • Porter Henze,
  • Lauren Franzen and
  • Haley Mosher

Titanite is an important mineral in petrochronology studies. Understanding chemical signatures of titanite from different environments can provide significant data in unraveling the complex histories recorded in their textures and compositions. Using...

  • Article
  • Open Access
2 Citations
2,545 Views
20 Pages

Electrostatic space accelerometers are high-precision instruments used in gravity and magnetic fields and in fundamental physics missions. From their first use in space, these instruments show disturbances around the read-out frequency. In recent mis...

  • Article
  • Open Access
6 Citations
3,115 Views
31 Pages

We reconstructed the seismotectonic setting of the area comprising the northeastern Friuli Plain and the Julian pre-Alpine border (NE Italy) by integrating geological and seismological data. The study area represents the junction between the SSE-verg...

  • Review
  • Open Access
25 Citations
7,357 Views
37 Pages

The stratigraphic development of foreland basins has mainly been related to surface loading in the adjacent orogens, whereas the control of slab loads on these basins has received much less attention. This has also been the case for interpreting the...

  • Feature Paper
  • Review
  • Open Access
15 Citations
4,885 Views
43 Pages

Order Parameter and Entropy of Seismicity in Natural Time before Major Earthquakes: Recent Results

  • Panayiotis A. Varotsos,
  • Nicholas V. Sarlis and
  • Efthimios S. Skordas

A lot of work in geosciences has been completed during the last decade on the analysis in the new concept of time, termed natural time, introduced in 2001. The main advances are presented, including, among others, the following: First, the direct exp...

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Geosciences - ISSN 2076-3263