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Geosciences, Volume 7, Issue 1

2017 March - 17 articles

Cover Story: Parallel dinosaur trackways can be used to infer that their makers were group animals. In this study, we evaluate whether Early Jurassic theropods in eastern North America were gregarious by examining trackway orientations in different paleoenvironments. We show that trackways lack preferred orientations in playa lake deposits and that parallelism is restricted to permanent lacustrine environments. These results suggest that, rather than group activity, trackway parallelism resulted from the animals interacting with their environment (i.e., they followed the shoreline of a permanent lake). View this paper
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Articles (17)

  • Article
  • Open Access
5 Citations
5,610 Views
17 Pages

Humans have built an anthropocentric biogeosphere; called: ‘human niche’. Global change is part of this historical process of niche construction, which implies the intersection of the biogeosphere and the sphere of human activities of social, economi...

  • Article
  • Open Access
21 Citations
8,426 Views
18 Pages

Analysis of Climate and Topography Impacts on the Spatial Distribution of Vegetation in the Virunga Volcanoes Massif of East-Central Africa

  • Alphonse Kayiranga,
  • Felix Ndayisaba,
  • Lamek Nahayo,
  • Fidele Karamage,
  • Jean Baptiste Nsengiyumva,
  • Christophe Mupenzi and
  • Enan Muhire Nyesheja

This paper aimed to investigate the influence of climatic and topographic factors on the distribution of vegetation in the Virunga Volcanoes Massif using GIS and remote sensing techniques. The climatic variables considered were precipitation, Land Su...

  • Review
  • Open Access
10 Citations
10,813 Views
26 Pages

The Pacific–North American plate boundary in California is composed of a 400-km-wide network of faults and zones of distributed deformation. Earthquakes, even large ones, can occur along individual or combinations of faults within the larger plate bo...

  • Article
  • Open Access
28 Citations
10,230 Views
32 Pages

Ophiolitic Remnants from the Upper and Intermediate Structural Unit of the Attic-Cycladic Crystalline Belt (Aegean, Greece): Fingerprinting Geochemical Affinities of Magmatic Precursors

  • Christina Stouraiti,
  • Iakovos Pantziris,
  • Charalampos Vasilatos,
  • Christos Kanellopoulos,
  • Panagiotis Mitropoulos,
  • Panagiotis Pomonis,
  • Robert Moritz and
  • Massimo Chiaradia

The ophiolitic rocks of the Attic-Cycladic crystalline belt are considered of key importance for understanding the Mesozoic tectonic evolution of the Aegean region. Unresolved questions concern their tectono-stratigraphic relationships across the reg...

  • Article
  • Open Access
17 Citations
8,820 Views
15 Pages

Perennial Lakes as an Environmental Control on Theropod Movement in the Jurassic of the Hartford Basin

  • Patrick R. Getty,
  • Christopher Aucoin,
  • Nathaniel Fox,
  • Aaron Judge,
  • Laurel Hardy and
  • Andrew M. Bush

Eubrontes giganteus is a common ichnospecies of large dinosaur track in the Early Jurassic rocks of the Hartford and Deerfield basins in Connecticut and Massachusetts, USA. It has been proposed that the trackmaker was gregarious based on parallel tra...

  • Article
  • Open Access
8 Citations
4,564 Views
15 Pages

Hydrochemistry and 222Rn Concentrations in Spring Waters in the Arid Zone El Granero, Chihuahua, Mexico

  • Marusia Rentería-Villalobos,
  • Alejandro Covarrubias-Muños,
  • Alfredo Pinedo-Álvarez and
  • Guillermo Manjon-Collado

Water in arid and semi-arid environments is characterized by the presentation of complex interactions, where dissolved chemical species in high concentrations have negative effects on the water quality. Radon is present in areas with a high uranium a...

  • Article
  • Open Access
6 Citations
11,108 Views
25 Pages

The Northeast Groundwater Management Area of Wisconsin, USA contains two major cones of depression in a confined sandstone aquifer. Each cone is centered near cities that have used groundwater for over 100 years. Near one of these cities (Green Bay),...

  • Article
  • Open Access
11 Citations
6,746 Views
13 Pages

Volcanic Plume CO2 Flux Measurements at Mount Etna by Mobile Differential Absorption Lidar

  • Simone Santoro,
  • Stefano Parracino,
  • Luca Fiorani,
  • Roberto D’Aleo,
  • Enzo Di Ferdinando,
  • Gaetano Giudice,
  • Giovanni Maio,
  • Marcello Nuvoli and
  • Alessandro Aiuppa

Volcanic eruptions are often preceded by precursory increases in the volcanic carbon dioxide (CO2) flux. Unfortunately, the traditional techniques used to measure volcanic CO2 require near-vent, in situ plume measurements that are potentially hazardo...

  • Article
  • Open Access
8 Citations
6,991 Views
16 Pages

Cr-spinels from ultramafic rocks from Lokris (Megaplatanos and Tragana), and Beotia (Ypato and Alyki) ophiolitic occurrences were studied. These rocks comprise principally harzburgite with minor dunite. Small amounts of clinopyroxene-rich harzburgite...

  • Editorial
  • Open Access
1 Citations
5,552 Views
3 Pages

With increasing interdisciplinarity, more studies are examining environmental problems from an integrated perspective. This is apparent in the geological sciences and physical geography, which incorporate various disciplinary approaches, including bi...

  • Article
  • Open Access
14 Citations
6,529 Views
22 Pages

Characterizing Degradation Gradients through Land Cover Change Analysis in Rural Eastern Cape, South Africa

  • Zahn Münch,
  • Perpetua I. Okoye,
  • Lesley Gibson,
  • Sukhmani Mantel and
  • Anthony Palmer

Land cover change analysis was performed for three catchments in the rural Eastern Cape, South Africa, for two time steps (2000 and 2014), to characterize landscape conversion trajectories for sustained landscape health. Land cover maps were derived:...

  • Article
  • Open Access
6 Citations
7,252 Views
13 Pages

Cembinder, Eka EXP36, and MEYCO MP320 are three colloidal silica materials that have been proposed for post-excavation grouting of deep tunnels in a radioactive waste repository. In this study, samples of these colloidal silicas were tested for their...

  • Article
  • Open Access
7 Citations
7,240 Views
30 Pages

Assessing the Long-Term Behaviour of the Industrial Bentonites Employed in a Repository for Radioactive Wastes by Studying Natural Bentonites in the Field

  • W. Russell Alexander,
  • Heini M. Reijonen,
  • Gillian MacKinnon,
  • Antoni E. Milodowski,
  • Alistair F. Pitty and
  • Andreas Siathas

Bentonite makes an important contribution to the performance of the engineered barriers in most radioactive waste repository designs. The choice of bentonite results from its favourable properties for waste isolation and its stability in relevant geo...

  • Editorial
  • Open Access
7 Citations
4,758 Views
2 Pages

Natural disasters, including floods, wildfires, volcanic eruptions, earthquakes, tsunamis, tropical storms, droughts, and landslides, can cause major losses of human lives and livelihoods, the destruction of economic and social infrastructure, as wel...

  • Article
  • Open Access
20 Citations
8,607 Views
23 Pages

The Central Asian Orogenic Belt (CAOB) records multiple Phanerozoic tectonic events involving consolidation of disparate terranes and cratonic blocks and subsequent reactivation of Eurasia’s continental interior. The final amalgamation of the CAOB te...

  • Article
  • Open Access
33 Citations
10,017 Views
24 Pages

Bentonite Permeability at Elevated Temperature

  • Katherine A. Daniels,
  • Jon F. Harrington,
  • Stephanie G. Zihms and
  • Andrew C. Wiseall

Repository designs frequently favour geological disposal of radioactive waste with a backfill material occupying void space around the waste. The backfill material must tolerate the high temperatures produced by decaying radioactive waste to prevent...

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Geosciences - ISSN 2076-3263