High-resolution carbon isotope ( 13Ccarb) chemostratigraphy of the lower Permian from the U.S. midcontinent: Checking the pulse of the late Paleozoic ice age

2014 ◽  
Vol 127 (3-4) ◽  
pp. 584-595 ◽  
Author(s):  
K. T. Cramer ◽  
M. Bostic
Keyword(s):  
High Resolution ◽  
Carbon Isotope ◽  
Ice Age ◽  
Late Paleozoic ◽  
Lower Permian ◽  
Late Paleozoic Ice Age ◽  
The U.S

Detrital zircons from Late Paleozoic Ice Age sequences in Victoria Land (Antarctica): New constraints on the glaciation of southern Gondwana

2021 ◽  
Author(s):  
Luca Zurli ◽  
Gianluca Cornamusini ◽  
Jusun Woo ◽  
Giovanni Pio Liberato ◽  
Seunghee Han ◽  
...  
Keyword(s):  
Detrital Zircon ◽  
Detrital Zircons ◽  
Ice Age ◽  
Late Paleozoic ◽  
Lower Permian ◽  
Petrographic Composition ◽  
Ice Cap ◽  
Victoria Land ◽  
Two Samples ◽  
Late Paleozoic Ice Age

The Lower Permian tillites of the Beacon Supergroup, cropping out in Victoria Land (Antarctica), record climatic history during one of the Earth’s coldest periods: the Late Paleozoic Ice Age. Reconstruction of ice-extent and paleo-flow directions, as well as geochronological and petrographic data, are poorly constrained in this sector of Gondwana. Here, we provide the first detrital zircon U-Pb age analyses of both the Metschel Tillite in southern Victoria Land and some tillites correlatable with the Lanterman Formation in northern Victoria Land to identify the source regions of these glaciogenic deposits. Six-hundred detrital zircon grains from four diamictite samples were analyzed using laser ablation−inductively coupled plasma−mass spectrometry. Geochronological and petrographic compositional data of the Metschel Tillite indicate a widespread reworking of older Devonian Beacon Supergroup sedimentary strata, with minor contribution from Cambro-Ordovician granitoids and meta-sedimentary units as well as Neoproterozoic metamorphic rocks. Euhedral to subhedral Carboniferous−Devonian zircon grains match coeval magmatic units of northern Victoria Land and Marie Byrd Land. This implies, in accordance with published paleo-ice directions, a provenance from the east-southeast sectors. In contrast, the two samples from northern Victoria Land tillite reflect the local basement provenance; their geochronological age and petrographic composition indicates a restricted catchment area with multiple ice centers. This shows that numerous ice centers were present in southern Gondwana during the Late Paleozoic Ice Age. While northern Victoria Land hosted discrete glaciers closely linked with the northern Victoria Land-Tasmania ice cap, the west-northwestward flowing southern Victoria Land ice cap contributed most of the sediments comprising the Metschel Tillite.

Carboniferous biostratigraphy of rugose corals

2021 ◽  
pp. SP512-2021-79
Author(s):  
Xiang-dong Wang ◽  
Sun-rong Yang ◽  
Le Yao ◽  
Tetsuo Sugiyama ◽  
Ke-yi Hu
Keyword(s):  
High Resolution ◽  
The Other ◽  
Ice Age ◽  
Late Paleozoic ◽  
Long Distance ◽  
Distance Correlation ◽  
Rugose Corals ◽  
Rugose Coral ◽  
Late Paleozoic Ice Age ◽  
Coral Composition

AbstractRugose corals are one of the major fossil groups in shallow-water environments. They played an important role in dividing and correlating Carboniferous strata during the last century, when regional biostratigraphic schemes were established and may be useful for long-distance correlation. Carboniferous rugose corals document two evolutionary events. One is the Tournaisian recovery event, with abundant occurrences of typical Carboniferous rugose corals such as columellate taxa and a significant diversification of large, dissepimented corals. The other is the changeover of rugose coral composition at the mid-Carboniferous boundary, which is represented by the disappearance of many large dissepimented taxa with complex axial structures and the appearance of typical Pennsylvanian taxa characterized by compound rugose taxa. The biostratigraphic scales for rugose corals show a finer temporal resolution in the Mississippian than in the Pennsylvanian, which was probably caused by the Late Paleozoic Ice Age that resulted in glacial-eustatic changes and a lack of continuous Pennsylvanian carbonate strata. The Pennsylvanian rugose corals are totally missing in the Cimmerian Continent. High-resolution biostratigraphy of rugose corals has so far only achieved in few regions for the Mississippian time scale. In most regions, more detailed taxonomic works and precise correlations between different fossil groups are needed.

scholarly journals The nonglacial diamictite of Toutswemogala Hill (lower Karoo Supergroup, central Botswana): Implications on the extent of the late Paleozoic ice age in the Kalahari–Karoo Basin

2019 ◽  
Vol 89 (10) ◽  
pp. 875-889 ◽  
Author(s):  
Pierre Dietrich ◽  
Fulvio Franchi ◽  
Larona Setlhabi ◽  
Rose Prevec ◽  
Marion Bamford
Keyword(s):  
Ice Age ◽  
Coarse Grained ◽  
Late Paleozoic ◽  
Lower Permian ◽  
Karoo Basin ◽  
Facies Associations ◽  
Late Paleozoic Ice Age ◽  
Glacial Epoch ◽  
Stratigraphic Position ◽  
Mass Flow Deposits

ABSTRACT Along the easternmost edge of the Karoo–Kalahari Basin (KKB) of Botswana, the Toutswemogala Hill succession exposes a 30–50-m-thick suite of siliciclastic deposits interpreted by some as glaciogenic in origin tied to the Permo-Carboniferous Late Paleozoic Ice Age (LPIA). Six facies associations (FA) were recognized in this succession, resting unconformably on a highly uneven Archean gneissic basement, and consisting from base to top of: 1) clast-supported breccia made up of angular cobbles and boulders ubiquitously derived from the underlying basement, 2) well-bedded siltstones sealing or locally interdigitated with the underlying breccia, and bearing abundant remnants of Glossopteris sp. leaves, 3) a chaotic to faintly laminated matrix-supported diamictite bearing angular and subrounded clasts and tree logs attributed to the genus Megaporoxylon, 4) cross-bedded conglomerate bearing well-rounded quartz and clasts, 5) planar-laminated to ripple-laminated, poorly sorted, muddy sandstones showcasing dispersed mud chips that grade upward into 6) poorly sorted, cross-bedded coarse-grained sandstones displaying convolute beds and abundant imprints of unidentifiable tree logs. No evidence of glaciogenic processes have been found in this succession, in the form of either pavement or clasts striations. The breccia and diamictite are interpreted as scree and mass-flow deposits, respectively. Along with the age of the deposits, inferred from the plant debris (upper Carboniferous to lower Permian), the stratigraphic position of this sedimentary succession resting on the Archean basement suggests that it corresponds to the Dukwi Formation, a stratigraphic equivalent of the Dwyka Group in the Main Karoo Basin. This would explain the resemblance of the facies to those recovered at the base of the central Kalahari–Karoo Basin and in the neighboring Tuli, Ellisras, and Tshipise basins. The absence of diagnostic criteria for glacial processes in the studied succession raises the question of the extent, in both time and space, of the LPIA-related ice masses over southern Africa and particularly in southeastern Botswana. It is suggested here that during this glacial epoch, spatially restricted ice masses were confined in bedrock valleys (valley glaciers) in an uplifted setting otherwise characterized by non-glaciogenic processes, further strengthening the scenario of fragmented ice masses over southern Gondwana.

SUBDUED ECOLOGICAL CONSEQUENCES OF THE LATE PALEOZOIC ICE AGE

2016 ◽  
Author(s):  
Matthew G. Powell ◽  
◽  
Ian-Michael Taylor-Benjamin
Keyword(s):  
Ice Age ◽  
Late Paleozoic ◽  
Ecological Consequences ◽  
Late Paleozoic Ice Age

CARBONIFEROUS HIGH PALEO-LATITUDE INVERTEBRATE PALEOECOLOGY OF PATAGONIA DURING THE LATE PALEOZOIC ICE AGE

2017 ◽  
Author(s):  
Kate M. Gigstad ◽  
◽  
Margaret L. Fraiser ◽  
John L. Isbell ◽  
Lydia T. Albright ◽  
...  
Keyword(s):  
Ice Age ◽  
Late Paleozoic ◽  
Late Paleozoic Ice Age
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