holocene record
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CATENA ◽  
2022 ◽  
Vol 209 ◽  
pp. 105798
Author(s):  
José Tasso Felix Guimarães ◽  
Prafulla Kumar Sahoo ◽  
Paulo Rógenes Monteiro Pontes ◽  
Gabriel Negreiros Salomão ◽  
Francisco Ribeiro da Costa ◽  
...  

2021 ◽  
Author(s):  
Geoff Richards ◽  
Jedrzej Majewski ◽  
Christabel Tan ◽  
Fangyi Tan ◽  
Tanghua Li ◽  
...  

<p>Reconstructions of relative sea level (RSL) during the Holocene provide important constraints for Glacial Isostatic Adjustment (GIA) models, determining Earth rheology, estimating ice-equivalent meltwater input, and fingerprinting sources of ice mass loss. In far-field regions such as the Indian Ocean, RSL is characterized by rapid rise during the early Holocene driven primarily by deglaciation of northern hemisphere ice sheets. This cumulated to a characteristic mid-Holocene highstand before falling towards present driven by hydro-isostatic processes. Reconstructions of RSL utilize proxy sea-level indicators to produce sea-level index points (SLIPs) that position RSL in time and space with an associated temporal and vertical uncertainty.</p><p>Here we present a standardized RSL database with a full consideration of uncertainty from the Maldives to investigate regional variations in the characteristics of the mid Holocene highstand, and to constrain the eustatic contribution to RSL change during the mid and late Holocene.</p><p>We produce new SLIPs from a mangrove forest in Kelaa, part of the Haa Alif Atoll in the northern area of the Maldives. We subsampled for mangrove macro fossils suitable for radiocarbon dating and obtained 5 dates with calibrated ages ranging between 630 – 1340 years BP. These new SLIPs show RSL was between 0.07m – -0.14m during this period.</p>


2021 ◽  
Vol 432 ◽  
pp. 106395
Author(s):  
Jinpeng Zhang ◽  
Michal Tomczak ◽  
Andrzej Witkowski ◽  
Kai Liang ◽  
Jan Harff ◽  
...  

2021 ◽  
Author(s):  
Hugh Genoways

A survey of the archeological and paleontological literature allowed a compilation of Holocene records of mammals in Nebraska. This survey identified Holocene records from 338 sites in 62 of the 93 Nebraska counties. These counties were located throughout state, but there was a concentration of sites in southwestern Nebraska where there were 27 fossil sites in Frontier County and 22 in Harlan County. Fossils sites were underrepresented in the Sand Hills region. Records of fossil mammals covered the entire Holocene period from 13,000 years ago until AD 1850. A minimum of 57 species (with eight additional species potentially present) representing six orders of mammals were represented in the compilation—four species of Lagomorpha, four species of Soricomorpha, 17 species of Carnivora (with three additional species potentially present), one species of Perissodactyla, six species of Artiodactyla, and 25 species of Rodentia (with five additional species potentially present). The remains of bison were found at 276 sites, which was more than for any other species in the state. Additional species that formed the main portion of the diet of Native Americans were the next most abundant in the fossil record—deer, pronghorn, and wapiti. That these food species dominated in the Holocene record was to be expected because fossils were recovered primarily from archeological sites.


2020 ◽  
Vol 430 ◽  
pp. 106347
Author(s):  
Eva Moreno ◽  
Fabien Caroir ◽  
Lea Fournier ◽  
Kelly Fauquembergue ◽  
Sébastien Zaragosi ◽  
...  

2020 ◽  
Vol 7 (1) ◽  
Author(s):  
Otmane Khalfaoui ◽  
Laurent Dezileau ◽  
Jean-Philippe Degeai ◽  
Maria Snoussi

Abstract The Atlantic coast of Morocco has been exposed to marine submersion events from storm surges and tsunamis which have resulted in human and economic losses. The absence of long term records for these hazards makes it difficult to trace their behavior through time, which is the first step to prepare proactive adaptation strategies for events that may happen in the future. In this paper, we present a late Holocene record of marine submersion events along the Atlantic coast of Morocco using a 2.7 m sediment core sampled from the Tahaddart estuary. The sedimentological and geochemical analyses conducted on this geological archive showed a mud-dominated sequence with 14 allochthonous sandy layers (E1-E14) left by marine high-energy events. The deposition age of three layers (E1, E13 and E14) has been determined using conventional dating methods (210Pbex, 137Cs and 14C). The first layer, introduced as E1 seems to fit with the great Lisbon tsunami in 1755 CE (Common Era), an event dated for the first time along the Atlantic coast of Morocco. The other two layers, referred to as E13 and E14, were dated between 3464 and 2837 cal BP (calibrated years Before Present) and chronologically correlated with marine high-energy deposits found on the Spanish Atlantic coast. This correlation confirms the existence of another regional event around 3200 BP.


Author(s):  
Çiğdem Atakuman ◽  
Burçin Erdoğu ◽  
Hasan Can Gemici ◽  
İsmail Baykara ◽  
Murat Karakoç ◽  
...  

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