Paleoenvironmental and paleoclimatic interpretation of the stratigraphic sequence of Lezetxiki II Cave (Basque Country, Iberian Peninsula) inferred from small vertebrate assemblages

2018 ◽  
Vol 90 (1) ◽  
pp. 164-179 ◽  
Author(s):  
Naroa Garcia-Ibaibarriaga ◽  
Aitziber Suárez-Bilbao ◽  
Salvador Bailon ◽  
Alvaro Arrizabalaga ◽  
María-José Iriarte-Chiapusso ◽  
...  
Keyword(s):  
Iberian Peninsula ◽  
Environmental History ◽  
Late Quaternary ◽  
Basque Country ◽  
Middle Pleistocene ◽  
Environmental Reconstruction ◽  
Stratigraphic Sequence ◽  
European Continent ◽  
History Of ◽  
Small Vertebrate

AbstractWe present a paleoenvironmental and paleoclimatic reconstruction based on microfaunal assemblages preserved at Lezetxiki II Cave (Arrasate, Basque Country, Iberian Peninsula) and synthesize previously published and new chronological work from the cave to better understand the environmental history of the region. The stratigraphic sequence of this short gallery ranges from the end of the middle Pleistocene to the middle Holocene and has great micropaleontological relevance for the Iberian Peninsula, especially because it contains the most ancient small vertebrate remains found in the Cantabrian region, likely deposited during Marine Oxygen Isotope Stage 7–6. Thirty-two small vertebrate taxa, including two extinct species, were identified. Environmental reconstruction based on small vertebrates suggests an open landscape at the base of the sequence (three lower levels) that progressively changed to woodland in the upper levels. Other paleoenvironmental data suggest a similar interpretation of the environmental history of the region, and although some uncertainty in the environmental reconstruction and chronology still exists, our data provide a richly detailed record of small vertebrates from an area that likely represented an important late Quaternary migration corridor for species traveling between the Iberian Peninsula and European continent.

scholarly journals Reconstructing the sedimentary history of Lezetxiki II cave (Basque Country, northern Iberian Peninsula) using micromorphological analysis

2018 ◽  
Vol 372 ◽  
pp. 96-111 ◽  
Author(s):  
Martin Arriolabengoa ◽  
Eneko Iriarte ◽  
Arantza Aranburu ◽  
Iñaki Yusta ◽  
Lee J. Arnold ◽  
...  
Keyword(s):  
Iberian Peninsula ◽  
Basque Country ◽  
Northern Iberian Peninsula ◽  
History Of ◽  
Micromorphological Analysis

Re-assessment of the mid to late Quaternary glacial and environmental history of the Boco Plain, western Tasmania.

2017 ◽  
Vol 160 ◽  
pp. 31-44 ◽  
Author(s):  
Paul Augustinus ◽  
David Fink ◽  
Michael-Shawn Fletcher ◽  
Ian Thomas
Keyword(s):  
Environmental History ◽  
Late Quaternary ◽  
History Of

Whole-Rock Aminostratigraphy and Quaternary Sea-Level History of the Bahamas

2000 ◽  
Vol 54 (2) ◽  
pp. 163-173 ◽  
Author(s):  
Paul J. Hearty ◽  
Darrell S. Kaufman
Keyword(s):  
Amino Acid ◽  
Sea Level ◽  
Late Quaternary ◽  
Radiometric Dating ◽  
Glacial Cycles ◽  
The Bahamas ◽  
Stratigraphic Sequence ◽  
Sequence Of Events ◽  
History Of ◽  
Mis 5E

The surficial geology of the tectonically stable Bahamian archipelago preserves one of the most complete records of middle to late Quaternary sea-level-highstand cycles in the world. However, with the exception of deposits from marine isotope substage (MIS) 5e, fossil corals for radiometric dating of this rich stratigraphic sequence are rare. This study utilizes the previously published, independent lithostratigraphic framework as a testing ground for amino acid racemization in whole-rock limestone samples. At least six limestone–soil couplets provide a relative age sequence of events that encompass as many interglacial–glacial cycles. D-Alloisoleucine/L-isoleucine data fall into six clusters, or “aminozones.” On the basis of independent dating and the inferred correlation with global MIS, the ages of several aminozones are known, while the ages of others are calculated from calibrated amino acid geochronology. This study demonstrates the utility of the whole-rock aminostratigraphy method for dating and correlating widespread emergent marine deposits, constitutes the first regional geochronological framework for the Bahamas, and highlights major sea-level events over the past half million years.

The late Quaternary environmental history of Bátorliget, N.E. Hungary

1995 ◽  
Vol 118 (1-2) ◽  
pp. 25-47 ◽  
Author(s):  
K.J. Willis ◽  
P. Sümegi ◽  
M. Braun ◽  
A. Tóth
Keyword(s):  
Environmental History ◽  
Late Quaternary ◽  
History Of

Late Quaternary Climate and Vegetation of the Sudanian Zone of Northeast Nigeria

2002 ◽  
Vol 58 (1) ◽  
pp. 73-83 ◽  
Author(s):  
Ulrich Salzmann ◽  
Philipp Hoelzmann ◽  
Irena Morczinek
Keyword(s):  
Environmental History ◽  
Late Pleistocene ◽  
Late Quaternary ◽  
Climatic Conditions ◽  
Lake Levels ◽  
The Holocene ◽  
Quaternary Climate ◽  
History Of ◽  
Sudanian Zone ◽  
Humid Period

AbstractThe Lake Tilla crater lake in northeastern Nigeria (10°23′N, 12°08′E) provides a ca. 17,000 14C yr multiproxy record of the environmental history of a Sudanian savanna in West Africa. Evaluation of pollen, diatoms, and sedimentary geochemistry from cores suggests that dry climatic conditions prevailed throughout the late Pleistocene. Before the onset of the Holocene, the slow rise in lake levels was interrupted by a distinct dry event between ca. 10,900 and 10,500 14C yr B.P., which may coincide with the Younger Dryas episode. The onset of the Holocene is marked by an abrupt increase in lake levels and a subsequent spread of Guinean and Sudanian tree taxa into the open grass savanna that predominated throughout the Late Pleistocene. The dominance of the mountain olive Olea hochstetteri suggests cool climatic conditions prior to ca. 8600 14C yr B.P. The early to mid-Holocene humid period culminated between ca. 8500 and 7000 14C yr B.P. with the establishment of a dense Guinean savanna during high lake levels. Frequent fires were important in promoting the open character of the vegetation. The palynological and palaeolimnological data demonstrate that the humid period terminated after ca. 7000 14C yr B.P. in a gradual decline of the precipitation/evaporation ratio and was not interrupted by abrupt climatic events. The aridification trend intensified after ca. 3800 14C yr B.P. and continued until the present.

Late Pleistocene and early Holocene environmental history of southwestern Washington State, U.S.A.

1984 ◽  
Vol 21 (6) ◽  
pp. 619-629 ◽  
Author(s):  
Cathy W. Barnosky
Keyword(s):  
Environmental History ◽  
Late Quaternary ◽  
Late Glacial ◽  
Cascade Range ◽  
Early Holocene ◽  
Olympic Mountains ◽  
Tundra Vegetation ◽  
Plant Remains ◽  
History Of ◽  
Glacial Time

A comparison of pollen records and associated plant remains from sites along a major precipitation gradient in southwestern Washington enables reconstruction of the late Quaternary environment during glacial and early Holocene time. During the Evans Creek Stade (25 000 – 17 000 years BP) little moisture reached lowlands east of the Olympic Mountains and as a result both the Puget Trough and the Columbia Basin featured a cold dry climate and parkland–tundra vegetation In glacial time, greatest aridity seems to have occurred between 19 000 and 17 000 years BP. After 17 000 years BP the development of mesophytic subalpine parkland suggests that maritime conditions extended farther east into the Puget Trough, and the Cascade Range became an important precipitation divide. Conditions warmer and (or) drier than today developed throughout western Washington between 10 000 and 8000–6000 years BP. Vegetation on opposite sides of the Cascade Range became dissimilar as early as 17 000 years BP, but this trend was accentuated in late glacial and early Holocene time.

scholarly journals Late-Quaternary Vegetational and Climatic History of the Yellowstone/Grand Teton Region

1988 ◽  
Vol 12 ◽  
pp. 189-192
Author(s):  
Cathy Barnosky
Keyword(s):  
Environmental History ◽  
Late Quaternary ◽  
Sediment Cores ◽  
Sediment Accumulation ◽  
Fire Frequency ◽  
Ice Age ◽  
Sediment Chemistry ◽  
History Of ◽  
Climatic History

The research underway has focused on two different aspects of the environmental history of the Yellowstone/Grand Teton region. One objective has been to examine the long-term vegetational and climatic history of Jackson Hole, the Pinyon Peak Highlands, and Yellowstone Park since the end of late Pinedale glaciation, about 14,000 years ago. Fossil pollen in sediment cores from lakes in the region is being analyzed to clarify the nature and composition of ice-age refugia, the rate and direction of plant migrations in the initial stages of reforestation, and the long-term stability of postglacial communities. Sedimentary charcoal also is being examined to reconstruct fire frequency during different climatic regions and different vegetation types in the past. This information is necessary to assess the sensitivity of plant communities to environmental change and to understand postglacial landscapes of the northern rocky Mountains. The second objective has been a multidisciplinary investigation of the relationship of climate to sedimentation rates in lakes and ponds in Yellowstone, undertaken with Drs. Wright, D.R. Engstrom and S.C. Fritz of the University of Minnesota. This facet of the research examines the relative importance of climate, fire, hillslope erosion induced by overgrazing, and nutrient enrichment in the last 150 years, as recorded in selected lakes in the northern range of Yellowstone. Populations of elk and bison are known to have fluctuated greatly during this interval, and slight climatic changes are suggested from other lines of research. In this study pollen, diatoms, charcoal, sediment chemistry, and sediment accumulation rates are analyzed in short cores from small lakes.

scholarly journals La lengua vasca en la Península entre Antigüedad y Edad Media. Observaciones a la "Communis opinio" / Basque language in the Iberian peninsula between Antiquity and Middle Ages. Some remarks on the "communis opinio"

2019 ◽  
Vol 52 (1/2) ◽  
pp. 553
Author(s):  
Matías Múgica
Keyword(s):  
Iberian Peninsula ◽  
Middle Ages ◽  
Basque Country ◽  
Linguistic History ◽  
History Of ◽  
The Middle Ages

The author argues, developing an idea proposed by French phoneticist Henri Gavel in the fifties, that the examination of the clearly Latin ancient toponymy of Upper Navarre suggests that the linguistic stratification usually proposed for the Middle Navarre (Navarra Media), an area where Basque was intensely spoken throughout the Middle Ages, should be reviewed and that in that area the Latin can be chronologically prior to the Basque, which would satisfactorily explain some unresolved knots of the linguistic history of the Basque Country and its surroundings.

scholarly journals Earliest occupation of the Central Aegean (Naxos), Greece: Implications for hominin and Homo sapiens’ behavior and dispersals

2019 ◽  
Vol 5 (10) ◽  
pp. eaax0997 ◽  
Author(s):  
Tristan Carter ◽  
Daniel A. Contreras ◽  
Justin Holcomb ◽  
Danica D. Mihailović ◽  
Panagiotis Karkanas ◽  
...  
Keyword(s):  
Homo Sapiens ◽  
Upper Paleolithic ◽  
Luminescence Dating ◽  
Middle Pleistocene ◽  
Southeast Europe ◽  
Stratigraphic Sequence ◽  
Early Upper Paleolithic ◽  
History Of ◽  
Alternative Routes ◽  
Early Upper

We present evidence of Middle Pleistocene activity in the central Aegean Basin at the chert extraction and reduction complex of Stelida (Naxos, Greece). Luminescence dating places ~9000 artifacts in a stratigraphic sequence from ~13 to 200 thousand years ago (ka ago). These artifacts include Mousterian products, which arguably provide first evidence for Neanderthals in the region. This dated material attests to a much earlier history of regional exploration than previously believed, opening the possibility of alternative routes into Southeast Europe from Anatolia (and Africa) for (i) hominins, potentially during sea level lowstands (e.g., Marine Isotope Stage 8) permitting terrestrial crossings across the Aegean, and (ii) Homo sapiens of the Early Upper Paleolithic (Aurignacian), conceivably by sea.

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