scholarly journals Taphonomy of mass mollusc shell accumulation at Amvrakikos Gulf lagoon complex sandy barriers (NW Greece)

Oceanologia ◽  
2020 ◽  
Author(s):  
Konstantinos Tsolakos ◽  
George Katselis ◽  
John A. Theodorou
Keyword(s):  
Mollusc Shell

Aminostratigraphic Correlation and Geochronology of Two Quaternary Loess Localities, Central Mississippi Valley

1994 ◽  
Vol 41 (3) ◽  
pp. 289-297 ◽  
Author(s):  
June E. Mirecki ◽  
Barry B. Miller
Keyword(s):  
Amino Acid ◽  
Kinetic Model ◽  
Mississippi Valley ◽  
River Section ◽  
Mollusc Shell ◽  
The Third ◽  
Shell Carbonate ◽  
Parabolic Kinetic

AbstractAmino acid epimeric (aIle/Ile) values from terrestrial molluscs are used to define and correlate three aminozones in loess sequences exposed across the central Mississippi Valley, in Arkansas and Tennessee. Three superposed aminozones are defined at Wittsburg quarry, Arkansas, primarily using aIle/Ile values from total hydrolysates of the gastropod genus Hendersonia: Peoria Loess (aIle/Ile = 0.07 ± 0.01), Roxana Silt (0.14 ± 0.02), and a third loess (0.28 ± 0.06). Loess units at Wittsburg quarry can be correlated on lithologic characteristics eastward across the Mississippi Valley to the Old River section, near Memphis, Tennessee; however, only one loess unit is fossil-bearing (Peoria Loess, aIle/Ile = 0.05) at that section. Radiocarbon analyses of charcoal from the upper Roxana Silt (ca. 26,000 to 29,000 yr old) and mollusc shell carbonate from the basal Roxana Silt (ca. 39,000 yr old) are used to calibrate amino acid epimeric data for the central Mississippi Valley. These data, applied to the apparent parabolic kinetic model of R. M. Mitterer and N. Kriausakul (1989, Quaternary Science Reviews 8, 353-357), suggest an Illinoian (>120,000 yr) age for the third loess in the central Mississippi Valley that is correlative with part of the Loveland Loess in Illinois and Iowa.

scholarly journals Prospek Sumber Daya Arkeologi Prasejarah Pulau Rote Ndao dalam Konteks Pengembangan Kawasan Perbatasan

KALPATARU ◽  
2019 ◽  
Vol 25 (2) ◽  
pp. 87
Author(s):  
Nasruddin Nasruddin
Keyword(s):  
Cultural Heritage ◽  
Field Observation ◽  
East Timor ◽  
Geological Condition ◽  
Human Settlement ◽  
Historical Evidence ◽  
Mollusc Shell ◽  
Animal Bones ◽  
Timor Leste ◽  
Lithic Artifacts

Abstract. The potential of cultural heritage especially prehistoric sites along the karst hills on Rote island has significant value in the context of understanding and knowledge about archeology in East Nusa Tenggara. Cave sites in Rote island were started to be inhabited since the late Pleistocene and early Holocene, based on the presence of human settlement traces found in the caves and niches. Another historical evidence was a bronze axe which showed that Rote Island was a strategic region on Paleometalic era. The fragments of potteries, flakes, animal bones, dan mollusc shells found in the area sprang some questions if this area was used only as a settlement or had any other purposes. The aim of this research is to reveal the archaeological resources owned by the island, along with its geological condition. The method applied in this study is using field observation (survey) followed by excavation on prehistory sites that represent Rote Ndao human settlements. Numerous lithic artifacts were gathered for reasearch data, such as flakes, pottery, and mollusc shell and bone deposits. These data about prehistoric karst in Rote Ndao island have important value to reveal the migration path, particularly its geographic position as the foremost island and borderline region between East Timor and Australia. Abstrak. Potensi warisan budaya terutama situs-situs prasejarah di sepanjang bukit-bukit karst di Pulau Rote memiliki nilai penting dalam konteks pemahaman dan pengetahuan arkeologi Nusa Tenggara Timur. Situs-situs gua karst di Pulau Rote, dimulai pada masa akhir Pleistosen dan awal Holosen dengan adanya jejak-jejak hunian manusia di gua dan ceruk. Bukti historis lainnya adanya temuan kapak perunggu yang menunjukkan bahwa Pulau Rote merupakan wilayah yang strategis pada era paleometalik. Ditemukannya berbagai jenis pecahan tembikar, serpih dan fragmen tulang fauna, sisa-sisa makanan moluska menimbulkan beberapa pertanyaan terhadap lokasi ini di masa lalu, apakah situs ini memiliki fungsi hunian semata, ataukah mempunyai fungsi lain. Tujuan penelitian ini untuk mengungkap sumberdaya arkeologi beserta kondisi geologi yang dimiliki Pulau Rote. Metode yang digunakan yaitu melakukan observasi lapangan (survei) dan dilanjutkan dengan ekskavasi terhadap situs yang memiliki indikasi kuat sebagai hunian prasejarah Rote dan dianggap mewakili situs hunian prasejarah Rote Ndao. Dari penelitian ini diperoleh sejumlah data artefak litik berupa alat-alat serpih, tembikar dan deposit cangkang moluska dan tulang. Potensi data arkeologi (prasejarah karst) Pulau Rote Ndao memiliki nilai penting untuk mengungkap jalur migrasi, terutama posisi geografinya sebagai pulau terdepan dan wilayah perbatasan antara Timor Leste dan Australia.

Mollusc Shell Shape as Pollution Biomarkers: What is the Best Biological Model?

2021 ◽  
Author(s):  
Nayara Gouveia ◽  
Cyntia Harayashiki ◽  
Federico Márquez ◽  
Italo B. Castro
Keyword(s):  
Biological Model ◽  
Shell Shape ◽  
Mollusc Shell

Mollusc shell fisheries in coastal Kenya: Local ecological knowledge reveals overfishing

2020 ◽  
Vol 195 ◽  
pp. 105285
Author(s):  
Victor Mwakha Alati ◽  
Jibril Olunga ◽  
Mike Olendo ◽  
Lillian Nduku Daudi ◽  
Kennedy Osuka ◽  
...  
Keyword(s):  
Local Ecological Knowledge ◽  
Ecological Knowledge ◽  
Mollusc Shell ◽  
Coastal Kenya

Spiers Memorial Lecture : Lessons from biomineralization: comparing the growth strategies of mollusc shell prismatic and nacreous layers in Atrina rigida

2007 ◽  
Vol 136 ◽  
pp. 9 ◽  
Author(s):  
Fabio Nudelman ◽  
Hong H. Chen ◽  
Harvey A. Goldberg ◽  
Steve Weiner ◽  
Lia Addadi
Keyword(s):  
Memorial Lecture ◽  
Growth Strategies ◽  
Mollusc Shell ◽  
Atrina Rigida

Co3O4@Highly ordered macroporous carbon derived from a mollusc shell for supercapacitors

RSC Advances ◽  
2015 ◽  
Vol 5 (92) ◽  
pp. 75105-75110 ◽  
Author(s):  
Yahui Liu ◽  
Wei Yu ◽  
Li Hou ◽  
Guanhong He ◽  
Zhihong Zhu
Keyword(s):  
High Performance ◽  
Mollusc Shell ◽  
Ordered Macroporous ◽  
Macroporous Carbon

Co3O4 cubes grown on highly ordered macroporous carbon are demonstrated for high-performance supercapacitor electrodes.

The mid-Holocene sea-level highstand at Bogenfels Pan on the southwest coast of Namibia

2006 ◽  
Vol 66 (2) ◽  
pp. 303-310 ◽  
Author(s):  
John S. Compton
Keyword(s):  
Sea Level ◽  
Southern Africa ◽  
Before Present ◽  
Southern Coast ◽  
Mollusc Shell ◽  
Mean Sea Level ◽  
The Holocene ◽  
Longshore Drift ◽  
Rapid Emergence ◽  
Holocene Sea Level

AbstractThe radiocarbon ages of mollusc shells from the Bogenfels Pan on the hyper arid southern coast of Namibia provide constraints on the Holocene evolution of sea level and in particular, the mid-Holocene highstand. The Bogenfels Pan was flooded to depths of 3 m above mean sea level (amsl) to form a large subtidal lagoon from 7300 to 6500 calibrated radiocarbon years before present (cal yr BP). The mollusc assemblage of the wave sheltered lagoon includes Nassarius plicatellus, Lutraria lutraria, and the bivalves Solen capensis and Gastrana matadoa, both of which no longer live along the wave-dominated southern Namibian coast. The radiocarbon ages of mollusc shell from a gravely beach deposit exposed in a diamond exploration trench indicate that sea level fell to near or 1 m below its present-day position between 6500 and 4900 cal yr BP. The rapid emergence of the pan between 6500 and 4900 cal yr BP exceeds that predicted by glacio-isostatic models and may indicate a 3-m eustatic lowering of sea level. The beach deposits at Bogenfels indicate that sea level rose to 1 m amsl between 4800 and 4600 cal yr BP and then fell briefly between 4600 and 4200 cal yr BP before returning to 1 m amsl. Since 4200 cal yr BP sea level has remained within one meter of the present-day level and the beach at Bogenfels has prograded seaward from the delayed arrival of sand by longshore drift from the Orange River. A 6200 cal yr BP coastal midden and a 600 cal yr BP midden 1.7 km from the coast indicate sporadic human utilization of the area. The results of this study are consistent with previous studies and help to refine the Holocene sea-level record for southern Africa.

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