Rivista e Edizione

Volume 28 (2022): Edizione 2 (August 2022)

Volume 28 (2022): Edizione 1 (April 2022)

Volume 27 (2021): Edizione 3 (December 2021)

Volume 27 (2021): Edizione 2 (August 2021)

Volume 27 (2021): Edizione 1 (April 2021)

Volume 26 (2020): Edizione 3 (December 2020)

Volume 26 (2020): Edizione 2 (August 2020)

Volume 26 (2020): Edizione 1 (April 2020)

Volume 25 (2019): Edizione 3 (December 2019)

Volume 25 (2019): Edizione 2 (August 2019)

Volume 25 (2019): Edizione 1 (April 2019)

Volume 24 (2018): Edizione 3 (December 2018)

Volume 24 (2018): Edizione 2 (August 2018)

Volume 24 (2018): Edizione 1 (March 2018)

Volume 23 (2017): Edizione 3 (December 2017)

Volume 23 (2017): Edizione 2 (June 2017)

Volume 23 (2017): Edizione 1 (March 2017)

Volume 22 (2016): Edizione 3 (September 2016)

Volume 22 (2016): Edizione 2 (June 2016)

Volume 22 (2016): Edizione 1 (March 2016)

Volume 21 (2015): Edizione 4 (December 2015)

Volume 21 (2015): Edizione 3 (September 2015)

Volume 21 (2015): Edizione 2 (June 2015)

Volume 21 (2015): Edizione 1 (March 2015)

Volume 20 (2014): Edizione 4 (December 2014)

Volume 20 (2014): Edizione 3 (September 2014)

Volume 20 (2014): Edizione 2 (June 2014)

Volume 20 (2014): Edizione 1 (March 2014)

Volume 19 (2013): Edizione 4 (December 2013)

Volume 19 (2013): Edizione 3 (September 2013)

Volume 19 (2013): Edizione 1-2 (May 2013)
Heavy-mineral analysis as a tool in earth-scientific research

Volume 18 (2012): Edizione 4 (December 2012)

Volume 18 (2012): Edizione 3 (October 2012)

Volume 18 (2012): Edizione 2 (August 2012)

Volume 18 (2012): Edizione 1 (March 2012)

Volume 17 (2011): Edizione 4 (December 2011)

Volume 17 (2011): Edizione 3 (September 2011)

Volume 17 (2011): Edizione 2 (June 2011)

Volume 17 (2011): Edizione 1 (April 2011)

Volume 16 (2010): Edizione 4 (December 2010)

Volume 16 (2010): Edizione 3 (October 2010)

Volume 16 (2010): Edizione 2 (June 2010)

Volume 16 (2010): Edizione 1 (April 2010)

Volume 15 (2009): Edizione 3-4 (December 2009)

Dettagli della rivista
Formato
Rivista
eISSN
2080-6574
Pubblicato per la prima volta
24 Dec 2009
Periodo di pubblicazione
3 volte all'anno
Lingue
Inglese

Cerca

Volume 20 (2014): Edizione 4 (December 2014)

Dettagli della rivista
Formato
Rivista
eISSN
2080-6574
Pubblicato per la prima volta
24 Dec 2009
Periodo di pubblicazione
3 volte all'anno
Lingue
Inglese

Cerca

4 Articoli
Accesso libero

Small-scale cyclic deposition in the Frasnian (Upper Devonian) of the Holy Cross Mountains, Poland

Pubblicato online: 06 Feb 2015
Pagine: 239 - 258

Astratto

Abstract

In sections exposing Frasnian limestones at five outcrops in the Holy Cross Mountains, five lithofacies (L1 to L5) that represent upper slope to basinal environments are identified. These lithofacies are characterised by dark-coloured micritic limestones-marly shale couplets with many light-coloured intercalations of fine- to coarse-grained limestones (= event beds). This lithofacies pattern characterises mostly low-energy domains punctuated by storm episodes. In addition, these upper-slope to basinal lithofacies are arranged into small-scale, coarsening-upward beds and cycles. The cycles are locally composed of fining/thinning-upward beds. The small-scale cycles have a calculated duration of 19 to 42 kyr. The differential thickness of beds and cycles within and between sections was probably caused by differential subsidence and local tectonics. Possible evidence of tectonic activity is also related to a difference in number of cycles recorded in the time-equivalent sections. The recognised cyclicity shows sea-level fluctuations and a few deepening episodes. Some of them are correlated with the Timan global eustatic events. However, local tectonics and episodic subsidence may have played a significant role in recording brief deepening pulses. Thus, low-amplitude sea-level changes were major factors in platform generation and evolution in the Frasnian of the Holy Cross Mountains modified by local, block-related subsidence.

Keywords

  • sedimentology
  • carbonate platform
  • limestones
  • shallowing-upward cycles
  • event beds
Accesso libero

Baltic Sea coastal erosion; a case study from the Jastrzębia Góra region

Pubblicato online: 06 Feb 2015
Pagine: 259 - 268

Astratto

Abstract

The coastline in the Jastrzębia Góra area can be divided into three major zones of general importance: a beach and barrier section, a cliff section, and a section protected by a heavy hydrotechnical construction. These areas are characterised by a diverse geology and origin, and hence different vulnerability to erosion. In addition, observations have demonstrated a different pace of erosion within each zone. Based on the results obtained by remote sensing methods (analysis of aerial photographs and maps), it has been determined that the coastline in the barrier area, i.e., to the west of Jastrzębia Góra, moved landwards by about 130 m, in a period of 100 years, and 80 m over about 50 years. A smaller displacement of the shoreline could be observed within the cliff. Between the middle of the twentieth and the start of the twenty-first centuries the shore retreated by about 25 m. However, in recent years, an active landslide has led to the displacement of the uppermost part of the cliff locally up to 25 m. Another issue is, functioning since 2000, a heavy hydrotechnical construction which has been built in order to protect the most active part of the cliff. The construction is not stable and its western part, over a distance of 50 m, has moved almost 2 m vertically downwards and c. 2.5 m horizontally towards the sea in the past two years. This illustrates that the erosional factor does not comprise only marine abrasion, but also involves land-based processes determined by geology and hydrogeology. Changes in the shoreline at the beach and barrier part are constantly conditioned by rising sea levels, the slightly sloping profile of the sea floor and low elevation values of the backshore and dune areas. Cliffs are destroyed by mass wasting and repetitive storm surges that are responsible for the removal of the colluvium which protects the coast from adverse wave effects. Presumably, mass movements combined with groundwater outflow from the cliff, plus sea abrasion cause destabilisation of the cliff protection construction.

Keywords

  • barrier and cliff coast
  • coastal landslides
  • coastal erosion
  • coastal protection
  • southern Baltic Sea
Accesso libero

Spatial variability of selected physicochemical parameters within peat deposits in small valley mire: a geostatistical approach

Pubblicato online: 06 Feb 2015
Pagine: 269 - 288

Astratto

Abstract

Geostatistical methods for 2D and 3D modelling spatial variability of selected physicochemical properties of biogenic sediments were applied to a small valley mire in order to identify the processes that lead to the formation of various types of peat. A sequential Gaussian simulation was performed to reproduce the statistical distribution of the input data (pH and organic matter) and their semivariances, as well as to honouring of data values, yielding more ‘realistic’ models that show microscale spatial variability, despite the fact that the input sample cores were sparsely distributed in the X-Y space of the study area. The stratigraphy of peat deposits in the Ldzań mire shows a record of long-term evolution of water conditions, which is associated with the variability in water supply over time. Ldzań is a fen (a rheotrophic mire) with a through-flow of groundwater. Additionally, the vicinity of the Grabia River is marked by seasonal inundations of the southwest part of the mire and increased participation of mineral matter in the peat. In turn, the upper peat layers of some of the central part of Ldzań mire are rather spongy, and these peat-forming phytocoenoses probably formed during permanent waterlogging.

Keywords

  • peat
  • geostatistics
  • organic matter
  • pH
  • spatial analysis
Accesso libero

Identification and visualisation of possible ancient ocean shoreline on Mars using submeter-resolution Digital Terrain Models

Pubblicato online: 06 Feb 2015
Pagine: 289 - 301

Astratto

Abstract

Digital Terrain Models (DTMs) produced from stereoscopic, submeter-resolution High Resolution Imaging Science Experiment (HiRISE) imagery provide a solid basis for all morphometric analyses of the surface of Mars. In view of the fact that a more effective use of DTMs is hindered by complicated and time-consuming manual handling, the automated process provided by specialists of the Ames Intelligent Robotics Group (NASA), Ames Stereo Pipeline, constitutes a good alternative. Four DTMs, covering the global dichotomy boundary between the southern highlands and northern lowlands along the line of the presumable Arabia shoreline, were produced and analysed. One of them included forms that are likely to be indicative of an oceanic basin that extended across the lowland northern hemisphere of Mars in the geological past. The high resolution DTMs obtained were used in the process of landscape visualisation.

Keywords

  • Arabia shoreline
  • Ames Stereo Pipeline
  • HiRISE
  • shoreline
  • landscape visualisation
4 Articoli
Accesso libero

Small-scale cyclic deposition in the Frasnian (Upper Devonian) of the Holy Cross Mountains, Poland

Pubblicato online: 06 Feb 2015
Pagine: 239 - 258

Astratto

Abstract

In sections exposing Frasnian limestones at five outcrops in the Holy Cross Mountains, five lithofacies (L1 to L5) that represent upper slope to basinal environments are identified. These lithofacies are characterised by dark-coloured micritic limestones-marly shale couplets with many light-coloured intercalations of fine- to coarse-grained limestones (= event beds). This lithofacies pattern characterises mostly low-energy domains punctuated by storm episodes. In addition, these upper-slope to basinal lithofacies are arranged into small-scale, coarsening-upward beds and cycles. The cycles are locally composed of fining/thinning-upward beds. The small-scale cycles have a calculated duration of 19 to 42 kyr. The differential thickness of beds and cycles within and between sections was probably caused by differential subsidence and local tectonics. Possible evidence of tectonic activity is also related to a difference in number of cycles recorded in the time-equivalent sections. The recognised cyclicity shows sea-level fluctuations and a few deepening episodes. Some of them are correlated with the Timan global eustatic events. However, local tectonics and episodic subsidence may have played a significant role in recording brief deepening pulses. Thus, low-amplitude sea-level changes were major factors in platform generation and evolution in the Frasnian of the Holy Cross Mountains modified by local, block-related subsidence.

Keywords

  • sedimentology
  • carbonate platform
  • limestones
  • shallowing-upward cycles
  • event beds
Accesso libero

Baltic Sea coastal erosion; a case study from the Jastrzębia Góra region

Pubblicato online: 06 Feb 2015
Pagine: 259 - 268

Astratto

Abstract

The coastline in the Jastrzębia Góra area can be divided into three major zones of general importance: a beach and barrier section, a cliff section, and a section protected by a heavy hydrotechnical construction. These areas are characterised by a diverse geology and origin, and hence different vulnerability to erosion. In addition, observations have demonstrated a different pace of erosion within each zone. Based on the results obtained by remote sensing methods (analysis of aerial photographs and maps), it has been determined that the coastline in the barrier area, i.e., to the west of Jastrzębia Góra, moved landwards by about 130 m, in a period of 100 years, and 80 m over about 50 years. A smaller displacement of the shoreline could be observed within the cliff. Between the middle of the twentieth and the start of the twenty-first centuries the shore retreated by about 25 m. However, in recent years, an active landslide has led to the displacement of the uppermost part of the cliff locally up to 25 m. Another issue is, functioning since 2000, a heavy hydrotechnical construction which has been built in order to protect the most active part of the cliff. The construction is not stable and its western part, over a distance of 50 m, has moved almost 2 m vertically downwards and c. 2.5 m horizontally towards the sea in the past two years. This illustrates that the erosional factor does not comprise only marine abrasion, but also involves land-based processes determined by geology and hydrogeology. Changes in the shoreline at the beach and barrier part are constantly conditioned by rising sea levels, the slightly sloping profile of the sea floor and low elevation values of the backshore and dune areas. Cliffs are destroyed by mass wasting and repetitive storm surges that are responsible for the removal of the colluvium which protects the coast from adverse wave effects. Presumably, mass movements combined with groundwater outflow from the cliff, plus sea abrasion cause destabilisation of the cliff protection construction.

Keywords

  • barrier and cliff coast
  • coastal landslides
  • coastal erosion
  • coastal protection
  • southern Baltic Sea
Accesso libero

Spatial variability of selected physicochemical parameters within peat deposits in small valley mire: a geostatistical approach

Pubblicato online: 06 Feb 2015
Pagine: 269 - 288

Astratto

Abstract

Geostatistical methods for 2D and 3D modelling spatial variability of selected physicochemical properties of biogenic sediments were applied to a small valley mire in order to identify the processes that lead to the formation of various types of peat. A sequential Gaussian simulation was performed to reproduce the statistical distribution of the input data (pH and organic matter) and their semivariances, as well as to honouring of data values, yielding more ‘realistic’ models that show microscale spatial variability, despite the fact that the input sample cores were sparsely distributed in the X-Y space of the study area. The stratigraphy of peat deposits in the Ldzań mire shows a record of long-term evolution of water conditions, which is associated with the variability in water supply over time. Ldzań is a fen (a rheotrophic mire) with a through-flow of groundwater. Additionally, the vicinity of the Grabia River is marked by seasonal inundations of the southwest part of the mire and increased participation of mineral matter in the peat. In turn, the upper peat layers of some of the central part of Ldzań mire are rather spongy, and these peat-forming phytocoenoses probably formed during permanent waterlogging.

Keywords

  • peat
  • geostatistics
  • organic matter
  • pH
  • spatial analysis
Accesso libero

Identification and visualisation of possible ancient ocean shoreline on Mars using submeter-resolution Digital Terrain Models

Pubblicato online: 06 Feb 2015
Pagine: 289 - 301

Astratto

Abstract

Digital Terrain Models (DTMs) produced from stereoscopic, submeter-resolution High Resolution Imaging Science Experiment (HiRISE) imagery provide a solid basis for all morphometric analyses of the surface of Mars. In view of the fact that a more effective use of DTMs is hindered by complicated and time-consuming manual handling, the automated process provided by specialists of the Ames Intelligent Robotics Group (NASA), Ames Stereo Pipeline, constitutes a good alternative. Four DTMs, covering the global dichotomy boundary between the southern highlands and northern lowlands along the line of the presumable Arabia shoreline, were produced and analysed. One of them included forms that are likely to be indicative of an oceanic basin that extended across the lowland northern hemisphere of Mars in the geological past. The high resolution DTMs obtained were used in the process of landscape visualisation.

Keywords

  • Arabia shoreline
  • Ames Stereo Pipeline
  • HiRISE
  • shoreline
  • landscape visualisation

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