The record of Carboniferous sea-level change in low-latitude sedimentary successions from Britain and Ireland during the onset of the late Paleozoic ice age

2008 ◽  
pp. 187-204 ◽  
Author(s):  
Sarah J. Davies
Keyword(s):  
Sea Level ◽  
Sea Level Change ◽  
Ice Age ◽  
Late Paleozoic ◽  
Low Latitude ◽  
Level Change ◽  
Late Paleozoic Ice Age

Incorporating sediment compaction into a gravitationally self-consistent model for ice age sea-level change

2017 ◽  
Vol 211 (1) ◽  
pp. 663-672 ◽  
Author(s):  
Ken L. Ferrier ◽  
Jacqueline Austermann ◽  
Jerry X. Mitrovica ◽  
Tamara Pico
Keyword(s):  
Sea Level ◽  
Sea Level Change ◽  
Ice Age ◽  
Level Change ◽  
Sediment Compaction ◽  
Consistent Model ◽  
Self Consistent

POTENSI ARKEOLOGI LANSKAP BAWAH AIR INDONESIA

KALPATARU ◽  
2019 ◽  
Vol 28 (1) ◽  
pp. 55
Author(s):  
Shinatria Adhityatama ◽  
Ajeng Salma Yarista
Keyword(s):  
Sea Level ◽  
Field Survey ◽  
Sea Level Change ◽  
Human Migration ◽  
Ice Age ◽  
Sunda Shelf ◽  
Archaeological Data ◽  
Level Change ◽  
Shelf Sea ◽  
And Migration

Indonesia has a great potential to be a country-wide laboratory of underwater landscape study. This is due  to the fact that its two main contingents, Sunda and Sahul, had been experiencing sea level rise  event  in the late of ice age which intersected the timeline of prehistoric human migration. Even though Indonesian ocean preserves the richness of underwater resources, including archaeological data, the study itself has not been touched by many. This paper will focus in two objectives: 1) Reconstructing paleo-river model and;2) Potential prehistoric remnants in Misool Islands caves. The method used includes field survey by diving and data brackets by using sub-bottom profiler.  Besides, we also conducted literature reviews.The results of this study indicate that the Sunda and Sahul Exposures are likely to  be  inhabited by  humans, but  at this time the remains have sunk on the seabed. It is hoped that this study can be the basis and motivation for future archeological research such as prehistoric human settlements and migration in a submerged landscape environment.Keywords:Submerged landscape, Sunda shelf, Sahul shelf, Sea-level change, Underwater archaeologyIndonesia memiliki potensi yang besar untuk menjadi sebuah laboratorium penelitian lanskap bawah air. Gagasan ini didasarkan pada fakta bahwa dua kontingen yang membentuk Indonesia, Paparan Sunda dan Sahul, mengalami perubahan air laut pada akhir zaman es yang bersinggungan dengan migrasi manusia prasejarah. Walaupun lautan Indonesia menyimpan kekayaan alam, termasuk data arkeologi, penelitian tentang lanskap bawah laut belum banyak disentuh. Studi ini bertujuan untuk membahas dua hal: 1) rekonstruksi model sungai purba dan;2) potensi peninggalan jejak prasejarah di gua bawah air di Pulau Misool. Metode yang digunakan adalah melakukan survei lapangan, dengan melakukan penyelaman dan perkeman data menggunakan alat akustik sub-bottom profiler, selain itu kami juga melakukan kajian dan review pustaka. Hasil studi ini menunjukkan bahwa Paparan Sunda dan Sahul kemungkinan besar telah dihuni oleh manusia namun pada saat ini peninggalannya telah tenggelam di dasar laut, diharapkan kajian ini dapat menjadi dasar dan motivasi untuk riset arkeologi mendatang seperti hunian dan migrasi manusia prasejarah pada lingkungan lanskap yang tenggelam.Kata kunci: Lanskap bawah air, Paparan sunda, Paparan sahul, Perubahan tinggi air laut, Arkeologi bawah air

scholarly journals Relative sea-level change in Greenland during the last 700yrs and ice sheet response to the Little Ice Age

2012 ◽  
Vol 315-316 ◽  
pp. 76-85 ◽  
Author(s):  
Antony J. Long ◽  
Sarah A. Woodroffe ◽  
Glenn A. Milne ◽  
Charlotte L. Bryant ◽  
Matthew J.R. Simpson ◽  
...  
Keyword(s):  
Sea Level ◽  
Little Ice Age ◽  
Ice Sheet ◽  
Sea Level Change ◽  
Ice Age ◽  
Relative Sea Level ◽  
Level Change

scholarly journals Climate pacing of millennial sea-level change variability in the central and western Mediterranean

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Matteo Vacchi ◽  
Kristen M. Joyse ◽  
Robert E. Kopp ◽  
Nick Marriner ◽  
David Kaniewski ◽  
...  
Keyword(s):  
Mediterranean Sea ◽  
Sea Level ◽  
Little Ice Age ◽  
Sea Level Change ◽  
Western Mediterranean ◽  
Ice Age ◽  
Cold Event ◽  
Level Change ◽  
The Common ◽  
Common Era

AbstractFuture warming in the Mediterranean is expected to significantly exceed global values with unpredictable implications on the sea-level rise rates in the coming decades. Here, we apply an empirical-Bayesian spatio-temporal statistical model to a dataset of 401 sea-level index points from the central and western Mediterranean and reconstruct rates of sea-level change for the past 10,000 years. We demonstrate that the mean rates of Mediterranean industrial-era sea-level rise have been significantly faster than any other period since ~4000 years ago. We further highlight a previously unrecognized variability in Mediterranean sea-level change rates. In the Common Era, this variability correlates with the occurrence of major regional-scale cooling/warming episodes. Our data show a sea-level stabilization during the Late Antique Little Ice Age cold event, which interrupted a general rising trend of ~0.45 mm a−1 that characterized the warming episodes of the Common Era. By contrast, the Little Ice Age cold event had only minor regional effects on Mediterranean sea-level change rates.

scholarly journals Low-latitude climate change linked to high-latitude glaciation during the Late Paleozoic Ice Age: evidence from the terrigenous detrital kaolinite

2021 ◽  
Author(s):  
Peixin Zhang ◽  
Jing Lu ◽  
Minfang Yang ◽  
Longyi Shao ◽  
Ziwei Wang ◽  
...  
Keyword(s):  
Climate Change ◽  
High Latitude ◽  
Ice Age ◽  
Late Paleozoic ◽  
Humid Climate ◽  
Low Latitude ◽  
Climate Conditions ◽  
Eastern Australia ◽  
Late Paleozoic Ice Age ◽  
Low Latitudes

Abstract. The Late Paleozoic Ice Age (LPIA; ca. 360–260 million years ago) was one of the most significant glacial events in Earth history that records cycles of ice advance and retreat in southern high-latitude Gondwana and provides a deep-time perspective for climate-glaciation coevolution. However, climate records from the LIPA are poorly understood in low latitudes, particularly in the North China Plate (NCP) on the eastern Palaeo-Tethys. We address this through a detailed mineralogical study of the marine-continental sedimentary succession in the Yuzhou Coalfield from the southern NCP in which we apply Zircon U-Pb dating, biostratigraphy, and high-resolution clay mineral composition to reconstruct latest Carboniferous to early Permian chronostratigraphy and climate change. The Benxi, Taiyuan, and Shanxi formations in the study area are assigned to the Gzhelian, Asselian-Artinskian, and Kungurian-Roadian stages respectively and the Carboniferous Permian lithostratigraphy across NCP recognized as widely diachronous. Detrital micromorphology of kaolinite under scanning electron microscopy and illite crystallization indicates kaolinite contents to be a robust proxy for palaeoclimate reconstruction. Kaolinite data show alternating warm-humid and cool-humid climate conditions that are roughly consistent with the calibrated glacial-interglacial successions recognized in high-latitude eastern Australia, including the glaciations P1 (Asselian-early Sakmarian) and P2 (late Sakmarian-early Artinskian), as well as the climatic transition to glaciation P3 (Roadian). Our results indicate a comparatively cool-humid and warm-humid climate mode in low-latitude NCP during glacial and interglacial periods, and this is a significant step toward connecting climate change in low-latitudes to high-latitude glaciation during the LPIA.

Trace-elemental and petrographic constraints on the severity of hydrographic restriction in the silled Midland Basin during the late Paleozoic ice age

2020 ◽  
Vol 133 (1-2) ◽  
pp. 57-73 ◽  
Author(s):  
Junwen Peng ◽  
Qilong Fu ◽  
Toti E. Larson ◽  
Xavier Janson
Keyword(s):  
Trace Element ◽  
Sea Level ◽  
Bottom Water ◽  
Ice Age ◽  
Late Paleozoic ◽  
Midland Basin ◽  
Late Paleozoic Ice Age ◽  
Water Conditions ◽  
Element Enrichment ◽  
Trace Element Enrichment

Abstract Enrichment of redox-sensitive trace elements in ancient marine shales is conventionally believed to be controlled by marine benthic redox conditions, whereas the influence of hydrographic conditions on trace element enrichment pattern has been rarely considered. Here, we present newly obtained data sets from the Upper Pennsylvanian organic-rich Cline Shale in the Midland Basin, Texas, to illustrate the influence of hydrographic circulation on the trace-element enrichment pattern and the stratigraphic record of mudrocks. Various lithofacies, including siliceous mudrocks, argillaceous mudrocks, skeletal-bearing argillaceous mudrocks, calcareous mudrocks, and wackestone, are identified in the Cline Shale. Significant changes in the trace-element enrichment pattern, mineral composition, texture of framboidal pyrite, and other bulk geochemical parameters in different lithofacies are interpreted to have been caused by high-amplitude and high-frequency glacio-eustatic sea-level oscillations in the silled Midland Basin during the late Paleozoic ice age. Specifically, glacio-eustatic sea-level falls generally resulted in the severe isolation of the Midland Basin from the Panthalassic Ocean, highly restricted hydrographic circulation, long deep-water renewal time, euxinic bottom-water conditions, depleted seawater Mo (molybdenum) in the silled basin, and low sediment Mo/TOC (total organic carbon), coupled with significant extrabasinal detrital quartz input, forming siliceous mudrocks. Enhanced phosphorus cycling and excellent preservation conditions are considered to be responsible for the high TOC observed in siliceous mudrocks. In contrast, glacio-eustatic sea-level rises substantially enhanced water exchange between the basin and the Panthalassic Ocean, created overall suboxic to anoxic bottom-water conditions, resupplied seawater Mo, elevated sediment Mo/TOC, and increased platform carbonate production in the basin, forming calcareous mudrocks and wackestone.

Phanerozoic Oxygen

2017 ◽  
Author(s):  
Donald Eugene Canfield
Keyword(s):  
Oxygen Consumption ◽  
Organic Carbon ◽  
Sea Level ◽  
Time Scale ◽  
Atmospheric Oxygen ◽  
Sea Level Change ◽  
Oxygen Production ◽  
Level Change ◽  
History Of ◽  
Geologic Processes

This chapter discusses the modeling of the history of atmospheric oxygen. The most recently deposited sediments will also be the most prone to weathering through processes like sea-level change or uplift of the land. Thus, through rapid recycling, high rates of oxygen production through the burial of organic-rich sediments will quickly lead to high rates of oxygen consumption through the exposure of these organic-rich sediments to weathering. From a modeling perspective, rapid recycling helps to dampen oxygen changes. This is important because the fluxes of oxygen through the atmosphere during organic carbon and pyrite burial, and by weathering, are huge compared to the relatively small amounts of oxygen in the atmosphere. Thus, all of the oxygen in the present atmosphere is cycled through geologic processes of oxygen liberation (organic carbon and pyrite burial) and consumption (weathering) on a time scale of about 2 to 3 million years.

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