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Geosciences, Volume 8, Issue 3

March 2018 - 24 articles

Cover Story: The worlds’ best-known fossil forests contain wood that has been mineralized with silica. Less well-known are woods that have been fossilized with non-silica minerals. This report provides the first comprehensive overview of non-silicified fossil woods, providing a summary of past research and presenting data from new discoveries. Regardless of composition, the process of mineralization involves the same basic factors: availability of dissolved elements, pH, Eh, and burial temperature. When mineral precipitation occurs in several successive episodes, fossil wood may have a complex composition. View the paper
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Articles (24)

  • Article
  • Open Access
11 Citations
6,850 Views
23 Pages

Geomorphology and Late Pleistocene–Holocene Sedimentary Processes of the Eastern Gulf of Finland

  • Daria Ryabchuk,
  • Alexander Sergeev,
  • Alexander Krek,
  • Maria Kapustina,
  • Elena Tkacheva,
  • Vladimir Zhamoida,
  • Leonid Budanov,
  • Alexandr Moskovtsev and
  • Aleksandr Danchenkov

In 2017, a detailed study of the Eastern Gulf of Finland (the Baltic Sea) seafloor was performed to identify and map submerged glacial and postglacial geomorphologic features and collect data pertinent to the understanding of sedimentation in postgla...

  • Article
  • Open Access
56 Citations
6,582 Views
14 Pages

A natural temporary imbalance of water availability, consisting of persistent lower-than-average or higher-than-average precipitation, can cause extreme dry and wet conditions that adversely impact agricultural yields, water resources, infrastructure...

  • Article
  • Open Access
10 Citations
6,307 Views
16 Pages

Regional Geomorphological Conditions Related to Recent Changes of Glacial Lakes in the Issyk-Kul Basin, Northern Tien Shan

  • Mirlan Daiyrov,
  • Chiyuki Narama,
  • Tsutomu Yamanokuchi,
  • Takeo Tadono,
  • Andreas Kääb and
  • Jinro Ukita

To assess the current state of glacial lakes, we examine the seasonal lake-area changes of 339 glacial lakes in the Teskey and Kungoy Ranges of the Issyk-Kul Basin, Kyrgyzstan, during 2013–2016 based on optical satellite images (Landsat7/ETM+ and 8/O...

  • Communication
  • Open Access
22 Citations
4,962 Views
13 Pages

An Emerging Paradigm for the UNESCO Global Geoparks: The Ecosystem’s Health Provision

  • Ronaldo Gabriel,
  • Helena Moreira,
  • Ana Alencoão,
  • Aurélio Faria,
  • Elizabeth Silva and
  • Artur Sá

During the 38th General Conference of UNESCO, the Member States ratified the creation of the International Geoscience and Geoparks Programme (IGGP) expressing governmental recognition of the importance of managing outstanding geological sites and lan...

  • Article
  • Open Access
3 Citations
4,432 Views
14 Pages

This article analyzes the lanthanum, cerium, samarium, europium, terbium, ytterbium, lutetium, uranium, and thorium content in humic acids within soil and paleosol surface horizons from the southern steppe in the Southern Urals. Research demonstrates...

  • Article
  • Open Access
17 Citations
4,475 Views
13 Pages

Environmental and Health: The Importance of Tremolite Occurence in the Pollino Geopark (Southern Italy)

  • Maria Carmela Dichicco,
  • Salvatore Laurita,
  • Rosa Sinisi,
  • Raimondo Battiloro and
  • Giovanna Rizzo

Worldwide studies have been done about the toxicity and carcinogenicity of asbestos minerals occurring in ophiolitic rocks. Inhalation of asbestos due to environmental exposure could cause malignant mesothelioma and lung cancers. In particular, the o...

  • Article
  • Open Access
12 Citations
4,919 Views
23 Pages

Release, Migration, Sorption, and (Re)Precipitation of U during Peraluminous Granite Alteration under Oxidizing Conditions in Central Portugal

  • Marina M. S. Cabral Pinto,
  • Maria M. V. G. Silva,
  • Ana M. R. Neiva,
  • Fernanda Guimarães and
  • Paulo B. Silva

In this work, in order to study the release, migration, sorption, and (re)precipitation of uranium (U) during alteration under oxidizing conditions, we carried out a systematic study using scanning electron microscopy, X-ray maps, and electron microp...

  • Article
  • Open Access
5 Citations
5,310 Views
16 Pages

Combined Use of Remote Sensing Data, Mineralogical Analyses, Microstructure Studies and Geographic Information System for Geological Mapping of Antiparos Island (Greece)

  • Konstantinos G. Nikolakopoulos,
  • Paraskevi Lampropoulou,
  • Dimitrios Papoulis,
  • Aikaterini Rogkala,
  • Panagiota P. Giannakopoulou and
  • Petros Petrounias

This study presents the combined use of field mapping, remote sensing data analysis, mineralogy, spectroscopy and GIS techniques for the geological mapping of Antiparos Island. Antiparos is part of the Cyclades Blueschist Belt located in central Aege...

  • Article
  • Open Access
254 Citations
21,209 Views
24 Pages

Unified Geomorphological Analysis Workflows with Benthic Terrain Modeler

  • Shaun Walbridge,
  • Noah Slocum,
  • Marjean Pobuda and
  • Dawn J. Wright

High resolution remotely sensed bathymetric data is rapidly increasing in volume, but analyzing this data requires a mastery of a complex toolchain of disparate software, including computing derived measurements of the environment. Bathymetric gradie...

  • Article
  • Open Access
23 Citations
7,350 Views
17 Pages

Seabed Morphology and Sedimentary Regimes defining Fishing Grounds along the Eastern Brazilian Shelf

  • Silvia N. Bourguignon,
  • Alex C. Bastos,
  • Valéria S. Quaresma,
  • Fernanda V. Vieira,
  • Hudson Pinheiro,
  • Gilberto Menezes Amado-Filho,
  • Rodrigo Leão De Moura and
  • João Batista Teixeira

Shelf morphology and sedimentary regimes are influenced by processes operating at different temporal and spatial scales and are important records of sea level changes and sediment supply and/or carbonate production. The northern continental shelf of...

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Geosciences - ISSN 2076-3263Creative Common CC BY license