scholarly journals The Funtana Morimenta Ichnosite (Sardinia, Italy): a Potential Geotourist Attraction

Geoheritage ◽  
2021 ◽  
Vol 13 (2) ◽  
Author(s):  
Daniel Zoboli ◽  
Gian Luigi Pillola
Keyword(s):  
Field Trips ◽  
Ice Age ◽  
Middle Pleistocene ◽  
Educational Goals ◽  
Significant Deterioration ◽  
Aeolian Deposits ◽  
Conservation Actions ◽  
Private Entrepreneurs ◽  
Late Middle Pleistocene

AbstractThe late Middle Pleistocene ichnosite of Funtana Morimenta (Gonnesa, Italy) provides a relevant scientific and didactic interest. In this site, tracks of megacerine deer and dwarf mammoths of the Ice Age are well-preserved and visible in situ. The geosite has also historic importance, and it has been mentioned since the beginning of the nineteenth century for the sedimentological features and its palaeontological content. For these reasons, the Funtana Morimenta ichnosite would represent an efficient tool for developing educational goals, such as teaching activities or field trips. Unfortunately, in the last years, it has shown significant deterioration because its sedimentological features (poorly cemented aeolian sandstone) made it susceptible to weathering. For this site to be available for future generations, great attention should be posed to its safeguard and avoid the permanent disappearance of what is currently a full-fledged natural and scientific resource. The conservation actions herein proposed will provide several benefits: they are meant to (i) valorize the aeolian deposits and the visible ichnofossils; (ii) show visitors, tourists, or students the geo-palaeontological richness of the territory; (iii) encourage tourists to explore the other numerous geosites spread in the island of Sardinia; and (iv) allow private entrepreneurs or local public administrations to develop economic opportunities.

scholarly journals Changes in Paleovegetation and Paleoclimate in China Since the Late Middle Pleistocene: A Case Study of the Dajiuhu Basin

2021 ◽  
Vol 13 (9) ◽  
pp. 4848
Author(s):  
Liwei Wu ◽  
Xinling Li ◽  
Qinghai Xu ◽  
Manyue Li ◽  
Qiufeng Zheng ◽  
...  
Keyword(s):  
Grain Size ◽  
Asian Monsoon ◽  
East Asian Monsoon ◽  
Asian Summer Monsoon ◽  
East Asian ◽  
Central China ◽  
Middle Pleistocene ◽  
Pollen Record ◽  
The Difference ◽  
Late Middle Pleistocene

The East Asian monsoon system is an important part of global atmospheric circulation; however, records of the East Asian monsoon from different regions exhibit different evolutionary rhythms. Here, we show a high-resolution record of grain size and pollen data from a lacustrine sediment core of Dajiuhu Lake in Shennongjia, Hubei Province, China, in order to reconstruct the paleovegetation and paleoeclimate evolution of the Dajiuhu Basin since the late Middle Pleistocene (~237.9 ka to the present). The results show that grain size and pollen record of the core DJH-2 are consistent with the δ18O record of stalagmites from Sanbao Cave in the same area, which is closely related to the changes of insolation at the precessional (~20-kyr) scale in the Northern Hemisphere. This is different from the records of the Asian summer monsoon recorded in the Loess Plateau of North China, which exhibited dominant 100-kyr change cyclicities. We suggest that the difference between paleoclimatic records from North and South China is closely related to the east–west-oriented mountain ranges of the Qinling Mountains in central China that blocked weakened East Asia summer monsoons across the mountains during glacial periods.

scholarly journals Gap analyses of priority wild relatives of food crop in current ex situ and in situ conservation in Indonesia

2021 ◽  
Author(s):  
Wiguna Rahman ◽  
Joana Magos Brehm ◽  
Nigel Maxted ◽  
Jade Phillips ◽  
Aremi R. Contreras-Toledo ◽  
...  
Keyword(s):  
Protected Areas ◽  
Protected Area ◽  
In Situ Conservation ◽  
Wild Relatives ◽  
Ex Situ ◽  
Area Network ◽  
Complementarity Analysis ◽  
Ex Situ Collections ◽  
Conservation Actions

AbstractConservation programmes are always limited by available resources. Careful planning is therefore required to increase the efficiency of conservation and gap analysis can be used for this purpose. This method was used to assess the representativeness of current ex situ and in situ conservation actions of 234 priority crop wild relatives (CWR) in Indonesia. This analysis also included species distribution modelling, the creation of an ecogeographical land characterization map, and a complementarity analysis to identify priorities area for in situ conservation and for further collecting of ex situ conservation programmes. The results show that both current ex situ and in situ conservation actions are insufficient. Sixty-six percent of priority CWRs have no recorded ex situ collections. Eighty CWRs with ex situ collections are still under-represented in the national genebanks and 65 CWRs have no presence records within the existing protected area network although 60 are predicted to exist in several protected areas according to their potential distribution models. The complementarity analysis shows that a minimum of 61 complementary grid areas (complementary based on grid cells) are required to conserve all priority taxa and 40 complementary protected areas (complementary based on existing protected areas) are required to conserve those with known populations within the existing in situ protected area network. The top ten of complementary protected areas are proposed as the initial areas for the development of CWR genetic reserves network in Indonesia. It is recommended to enhanced coordination between ex situ and in situ conservation stakeholders for sustaining the long term conservation of CWR in Indonesia. Implementation of the research recommendations will provide for the first time an effective conservation planning of Indonesia’s CWR diversity and will significantly enhance the country’s food and nutritional security.

From Terranes to Terrains: Geologic Field Guides on the Construction and Destruction of the Pacific Northwest

2021 ◽  
Keyword(s):  
Pacific Northwest ◽  
Hot Spot ◽  
Flood Basalt ◽  
Field Trips ◽  
Ice Age ◽  
Basin And Range Province ◽  
Western Margin ◽  
Field Guides ◽  
The Pacific ◽  
The Rich

The eight field trips in this volume, associated with GSA Connects 2021 held in Portland, Oregon, USA, reflect the rich and varied geological legacy of the Pacific Northwest. The western margin of North America has had a complex subduction and transform history throughout the Phanerozoic, building a collage of terranes. The terrain has been modified by Cenozoic sedimentation, magmatism, and faulting related to Cascadia subduction, passage of the Yellowstone hot spot, and north and westward propagation of the Basin and Range province. The youngest flood basalt province on Earth also inundated the landscape, while the mighty Columbia watershed kept pace with arc construction and funneled epic ice-age floods from the craton to the coast. Additional erosive processes such as landslides continue to shape this dynamic geological wonderland.

scholarly journals Luminescence dating of a late Middle Pleistocene glacial advance in eastern England

2021 ◽  
Vol 100 ◽  
Author(s):  
Philip L. Gibbard ◽  
Mark D. Bateman ◽  
Jane Leathard ◽  
R.G. West
Keyword(s):  
Previous Investigation ◽  
Alluvial Fan ◽  
Luminescence Dating ◽  
Marine Isotope Stage ◽  
Middle Pleistocene ◽  
Eastern Margin ◽  
First Time ◽  
Late Middle Pleistocene ◽  
Glacial Advance

Abstract Previous investigation of isolated landforms, on the eastern margin of the East Anglian Fenland, England, has demonstrated that they represent an ice-marginal delta and alluvial fan complex deposited at the margin of an ice lobe that entered the Fenland during the ‘Tottenhill glaciation’ (termed the ‘Skertchly Line’). They have been attributed, based on regional correlations, to a glaciation during the Late Wolstonian (i.e. Late Saalian) Substage (Drenthe Stadial, early Marine Isotope Stage (MIS) 6). This paper aimed to test this correlation by directly optically luminescence dating, for the first time, sediments found within the Skertchly Line at Shouldham Thorpe, Norfolk, and Maidscross Hill, Suffolk, together with those in associated kame terrace deposits at Watlington, Norfolk. Ages ranged from 244 ± 10 ka to 12.8 ± 0.46 ka, all the results being younger than MIS 8 with some clearly showing the landforms have been subsequently subjected to periglacial processes, particularly during the Late Devensian Substage (∼MIS 2). Most of the remainder fall within the range 169–212 ka and could be assigned to MIS 6, thus confirming the previously proposed age of the glaciation. The local and regional implications of these conclusions are discussed, the maximum ice limit being linked to that of the Amersfoort–Nijmegen glaciotectonic ridge limit in the central Netherlands.

scholarly journals Palaeoecology and Archaeology of the Kärlich–Seeufer Open-Air Site (Middle Pleistocene) in the Central Rhineland, Germany

1996 ◽  
Vol 46 (3) ◽  
pp. 319-334 ◽  
Author(s):  
Sabine Gaudzinski ◽  
Felix Bittmann ◽  
Wolfgang Boenigk ◽  
Manfred Frechen ◽  
Thijs Van Kolfschoten
Keyword(s):  
Boreal Forests ◽  
Archaeological Site ◽  
Sensu Stricto ◽  
Middle Pleistocene ◽  
Recent Analysis ◽  
Small Lake ◽  
Wooden Structure ◽  
Archaeological Sample

The Kärlich–Seeufer archaeological site in Germany's central Rhineland was excavated between 1980 and 1992. The site provides evidence for hominid activity during a Middle Pleistocene interglaciation known up to now only from the Kärlich clay pit and therefore defined as the Kärlich Interglaciation, which is considered to be post-Cromer IV and pre-Holstein (sensu stricto) in age. The site is characterized by Acheulean artifacts, a fauna dominated by Elephas (Palaeoloxodon) antiquus, and a unique and outstanding preservation of wooden and other palaeobotanical remains. Assuming all finds are associated, the site previously was interpreted as an elephant hunting camp with a wooden structure, together with wood and bone implements preserved in situ. Recent analysis of the same features has shown that the site can also be interpreted as a reworked archaeological sample. Hominid occupation occurred in the vicinity of a small lake with prevailing meso-oligotrophic conditions. Expanding boreal forests and fen vegetation characterized the landscape.

scholarly journals Tensile fracture of a single crack in first-year sea ice

2018 ◽  
Vol 376 (2129) ◽  
pp. 20170346 ◽  
Author(s):  
J. P. Dempsey ◽  
D. M. Cole ◽  
S. Wang
Keyword(s):  
Sea Ice ◽  
Field Trips ◽  
Cohesive Crack ◽  
The Arctic ◽  
Tensile Fracture ◽  
First Year ◽  
Crack Model ◽  
Separation Curve ◽  
Ice Phenomena

The break-up of sea ice in the Arctic and Antarctic has been studied during three field trips in the spring of 1993 at Resolute, NWT, and the fall of 2001 and 2004 on McMurdo Sound via in situ cyclic loading and fracture experiments. In this paper, the back-calculated fracture information necessary to the specification of an accurate viscoelastic fictitious (cohesive) crack model is presented. In particular, the changing shape of the stress separation curve with varying conditions and loading scenarios is revealed. This article is part of the theme issue ‘Modelling of sea-ice phenomena’.

Late Middle Pleistocene deposits at Norton Farm on the West Sussex coastal plain, southern England

2000 ◽  
Vol 15 (1) ◽  
pp. 61-89 ◽  
Author(s):  
Martin R. Bates ◽  
C. Richard Bates ◽  
Philip L. Gibbard ◽  
Richard I. Macphail ◽  
Frederick J. Owen ◽  
...  
Keyword(s):  
Coastal Plain ◽  
Middle Pleistocene ◽  
The West ◽  
Southern England ◽  
Late Middle Pleistocene

Excavation of the Lower Palaeolithic Site at Amey's Eartham Pit, Boxgrove, West Sussex: A Preliminary Report.

1986 ◽  
Vol 52 ◽  
pp. 215-245 ◽  
Author(s):  
M. B. Roberts ◽  
M. R. Bates ◽  
C. Bergman ◽  
A. P. Currant ◽  
J. R. Haynes ◽  
...  
Keyword(s):  
Comparative Analysis ◽  
Preliminary Report ◽  
Site Formation ◽  
Middle Pleistocene ◽  
Site Formation Processes ◽  
Formation Processes ◽  
Environmental Reconstruction ◽  
Multidisciplinary Research ◽  
Lower Palaeolithic

The acheulian site at Boxgrove contains one of the most extensive areas of in situ fauna and flintwork yet discovered in Britain. This material is found in a complex sequence of sediments which represent depositional conditions from a 42 m sea level rise to the onset of a full periglacial climate. Excavation of the archaeological horizon has been accompanied by a programme of multidisciplinary research examining site formation processes, palaeolandscape and palaeoecological development, using sedimentological and environmental reconstruction techniques. Dating of the site is tentative as no absolute dates are available at present. However, comparative analysis with other British sites would suggest a position for the Boxgrove sequence within the Middle Pleistocene. The archaeological horizon is interpreted as being deposited towards the latter part of an interglacial or an interstadial period.

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