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Geosciences, Volume 8, Issue 11

November 2018 - 43 articles

Cover Story: Coral tsunami boulders in Ishigaki Island, Japan showed a measurable intensity of remanent magnetization, although it is well known that corals skeletons have extremely weak remanent magnetization. To know what the origin of remanence is, in this study, we characterized magnetic assemblages in this coral skeleton to determine whether it is of biogenic or detrital magnetite using first-order reversal curve (FORC) measurements, ferromagnetic resonance (FMR) spectroscopy, and petrological observations through field-emission type scanning electron microscope (FE-SEM) with an acid treatment. Our findings indicate that the magnetic assemblage in coral tsunami boulders consists of biogenic-origin single-domain magnetites with a trace amount of detrital component. Therefore, fossil coral skeletons in Ishigaki Island have great potential for utilization for paleomagnetic studies. View this paper
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Articles (43)

  • Article
  • Open Access
6 Citations
4,040 Views
14 Pages

13 November 2018

The karst aquifers of the Hellenic territory display high vulnerability that is related to the existence of the epikarst zone. If present, the epikarst zone regulates the vertical movement of the groundwater, which results in the chemical pollutants...

  • Article
  • Open Access
17 Citations
5,542 Views
20 Pages

Rare Biosphere Archaea Assimilate Acetate in Precambrian Terrestrial Subsurface at 2.2 km Depth

  • Maija Nuppunen-Puputti,
  • Lotta Purkamo,
  • Riikka Kietäväinen,
  • Mari Nyyssönen,
  • Merja Itävaara,
  • Lasse Ahonen,
  • Ilmo Kukkonen and
  • Malin Bomberg

13 November 2018

The deep biosphere contains a large portion of the total microbial communities on Earth, but little is known about the carbon sources that support deep life. In this study, we used Stable Isotope Probing (SIP) and high throughput amplicon sequencing...

  • Communication
  • Open Access
2 Citations
2,474 Views
8 Pages

12 November 2018

Large clasts are in focus of the modern geoscience research, but their broadly-accepted classification is absent and specialists tend to over-emphasize on clasts of coastal zones. New field investigations in the Western Caucasus have permitted the fi...

  • Article
  • Open Access
15 Citations
6,102 Views
35 Pages

Present Glaciers of Tavan Bogd Massif in the Altai Mountains, Central Asia, and Their Changes since the Little Ice Age

  • Dmitry A. Ganyushkin,
  • Kirill V. Chistyakov,
  • Ilya V. Volkov,
  • Dmitry V. Bantcev,
  • Elena P. Kunaeva,
  • Tatyana A. Andreeva,
  • Anton V. Terekhov and
  • Demberel Otgonbayar

12 November 2018

The Tavan Bogd mountains (of which, the main peak, Khuiten Uul, reaches 4374 m a.s.l.) are situated in the central part of the Altai mountain system, in the territories of Russia, Mongolia and China. The massif is the largest glacierized area of Alta...

  • Article
  • Open Access
56 Citations
8,168 Views
20 Pages

How to Define Priorities in Coastal Vulnerability Assessment

  • Francesca De Serio,
  • Elvira Armenio,
  • Michele Mossa and
  • Antonio Felice Petrillo

12 November 2018

Awareness of coastal landscapes vulnerability to both natural and man-made hazards induce to monitor their evolution, adaptation, resilience and to develop appropriate defence strategies. The necessity to transform the monitoring results into useful...

  • Article
  • Open Access
36 Citations
9,139 Views
26 Pages

Hydrodynamic and Debris-Damming Failure of Bridge Decks and Piers in Steady Flow

  • Kevin Oudenbroek,
  • Nader Naderi,
  • Jeremy D. Bricker,
  • Yuguang Yang,
  • Cor Van der Veen,
  • Wim Uijttewaal,
  • Shuji Moriguchi and
  • Sebastiaan N. Jonkman

In countries with steep rivers, such as Japan and the United States, bridges fail on an annual basis. Bridges on spread footings are especially susceptible to failure by hydrodynamic loading, often exacerbated by debris damming. Here, such failures a...

  • Article
  • Open Access
14 Citations
4,112 Views
11 Pages

Geochemical Features of Fallow Land in Ancient Plots in the Chora of Chersonesos

  • Fedor Lisetskii,
  • Eugenia Zelenskaya and
  • Maria Rodionova

The ancient city of Chersonesos created an agricultural zone in the 4th and 3rd centuries BC (under the conditions of climate aridization); this zone was initially used for viticulture and the export of wine, and grain farming later developed at the...

  • Article
  • Open Access
1 Citations
5,774 Views
25 Pages

An Investigation into the Theft of Concentrates and Their Upgrading to Saleable Platinum-Products

  • Robert Schouwstra,
  • Johan Mocke,
  • Michael Duncan,
  • Siksha Bramdeo and
  • Yolanda Scharneck

Over the years the theft of material from platinum producers has mainly taken place from high-grade areas such as the precious- and base-metal refineries and the converter and smelting operations. At some concentrators, the metallic stream, which con...

  • Article
  • Open Access
37 Citations
12,653 Views
19 Pages

Field Survey of 2018 Typhoon Jebi in Japan: Lessons for Disaster Risk Management

  • Tomoyuki Takabatake,
  • Martin Mäll,
  • Miguel Esteban,
  • Ryota Nakamura,
  • Thit Oo Kyaw,
  • Hidenori Ishii,
  • Justin Joseph Valdez,
  • Yuta Nishida,
  • Fuma Noya and
  • Tomoya Shibayama

Typhoon Jebi struck Japan on the 4 September 2018, damaging and inundating many coastal areas along Osaka Bay due to the high winds, a storm surge, and wind driven waves. In order to understand the various damage mechanisms, the authors conducted a f...

  • Article
  • Open Access
28 Citations
4,960 Views
18 Pages

Selenium, Sulphur, Trace Metal, and BTEX Levels in Soil, Water, and Lettuce from the Croatian Raša Bay Contaminated by Superhigh-Organic-Sulphur Coal

  • Gordana Medunić,
  • Željka Kuharić,
  • Adela Krivohlavek,
  • Marija Đuroković,
  • Kristina Dropučić,
  • Ankica Rađenović,
  • Borna Lužar Oberiter,
  • Aleksandra Krizmanić and
  • Mladen Bajramović

This paper elaborates soil, water, and lettuce contamination status with respect to selenium, sulphur, trace metals, and BTEX (benzene, toluene, ethylbenzene, and xylenes) in a coal-based area (Raša Bay, Adriatic Sea, Croatia). A local coal-fi...

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Geosciences - ISSN 2076-3263Creative Common CC BY license