Inverse relation between ice extent and the late Paleozoic glacial record of Gondwana

González-Bonorino, Gustavo; Eyles, Nicholas

doi:10.1130/0091-7613(1995)023<1015:irbiea>2.3.co;2

Cited by 76 publications

(30 citation statements)

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“…facilitated by foundering of the basement blocks (Visser, 1990, his Fig. 6;Gonzá lez-Bonorino and Eyles, 1995). Foundering is understood as the process of lithospheric sinking.…”

Section: Dynamic Topography and Glacially-influenced Sedimentationmentioning

confidence: 98%

Tectonic evolution of the Cape and Karoo basins of South Africa

Tankard¹,

Welsink²,

Aukes

et al. 2009

Marine and Petroleum Geology

236

179

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“…facilitated by foundering of the basement blocks (Visser, 1990, his Fig. 6;Gonzá lez-Bonorino and Eyles, 1995). Foundering is understood as the process of lithospheric sinking.…”

Section: Dynamic Topography and Glacially-influenced Sedimentationmentioning

confidence: 98%

Tectonic evolution of the Cape and Karoo basins of South Africa

Tankard¹,

Welsink²,

Aukes

et al. 2009

Marine and Petroleum Geology

236

179

View full text Add to dashboard Cite

“…Strata of similar characteristics and age are also found in Australia, Africa, South America and Antarctica that along with India constituted the supercontinent Gondwanaland during the Permo-Carboniferous period (Hobday 1987;Veevers 2004). It is generally conceived that the Talchir and the other similar strata of the Gondwanaland assembly were formed during a period of continental glacial events (Crowell and Frakes 1975;Veevers and Powell 1987;Crowell 1995;Gonzalez-Bonorino and Eyles 1995;Eyles et al 1998Eyles et al , 2002Eyles et al , 2003. In this paper we present a detailed sedimentological analysis of the Talchir Formation of the Satpura Gondwana basin and decipher the depositional record of glacially influenced sedimentation in an intracontinental basin of the Indian subcontinent during the Permian glacial event.…”

Section: Introductionmentioning

confidence: 96%

Pattern of sedimentation during the Late Paleozoic, Gondwanaland glaciation: An example from the Talchir Formation, Satpura Gondwana basin, central India

Chakraborty

Ghosh

2008

J Earth Syst Sci

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The Talchir Formation of Permian age is the lowermost lithostratigraphic unit of the Indian Gondwana successions preserving a record of the Late Paleozoic glaciation that affected the whole Gondwanaland. The formation unconformably overlies the Precambrian basement in all the Gondwana basins of India, and marks initiation of sedimentation after a long hiatus since the Proterozoic. The Talchir Formation of the Satpura Gondwana basin of central India shows features diagnostic of deposition under glacial regime such as the presence of diamictites, boulder pavements, bedding plane striation, faceted/striated gravels, bullet-shaped clasts, dropstone, cryoturbation, etc. The Talchir strata of the Satpura basin, in addition to tidal signatures, contain marine bivalve and trace fossils. A proglacial marine environment is thus inferred for their deposition. The dominant lithologies are conglomerate, pebbly sandstone, sandstone and shale with little limestone, which can be classified into the following major facies:• matrix-supported conglomerate, • clast-supported conglomerate, • cross-stratified, channel form pebbly sandstone, • hummocky, swaley or low-angle cross-stratified pebbly and non-pebbly sandstone, • turbidite/tempestite sheet sandstone, • massive to fissile, green to black claystone with carbonate layers and nodules.The conglomerates are interpreted as deposits of a spectrum of sub-aqueous sediment gravity flows including debris flow, hyperconcentrated/concentrated density flow and grain flow. The crossstratified pebbly sandstone bodies, on the other hand, represent braidplain delta deposits of glacial outwash origin. Hummocky, swaley, low-angle cross-stratified sediment bodies were deposited by storm-generated combined flows in a shoreface setting. In contrast, the sheet sandstone bodies are products of turbidity currents and storm-induced density currents in an inner shelf setting below fair weather wave base. The claystone facies is interpreted as a product of suspension fallout from hypopycnal sediment plumes in the outer shelf domain below storm wave base. All the lithofacies described above occur repetitively in the succession. Three facies-associations have been recognized in the Talchir Formation, representing ice-contact fandelta, outwash braidplain delta and a virtually ice-free, non-deltaic open marine realm. The different marine facies of the Talchir Formation define a number of shallowing-upward packages, which are arranged in the succession with a retrogradational trend to result in an overall fining-and deepening-upward succession. The overlying coal-bearing Barakar Formation has been interpreted to have formed in a tide-wave influenced deltaic setting with a marine, prodeltaic part. The strata that are transitional between Talchir and Barakar Formations show preservation of abundant plant materials suggesting gradual warming. The three facies-associations of the Talchir Formation also point towards progressive decrease in the intensity of glacial activity, inducing changes in the paleogeography ...

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“…(Gibling 1995;Veevers & Powell 1987). The withdrawal pre-dates, however, the Namurian maxima inferred for the Gondwanan ice cap (Gonzalez-Bonorino & Eyles 1995) and is inconsistent with documented major global regressions (Veevers & Powell 1987), including the Mississippian-Pennsylvanian boundary event (Saunders & Ramsbottom 1986). At the same time across Euramerica, the converging circumequatorial continents heralded a Mid-Carboniferous episode of thrusting, transpression and inversion, discussed below, which had potential to effect a similar result.…”

Section: Visdanmentioning

confidence: 98%

“…The transpression in Nova Scotia at this time lends support to the role of tectonic inversion in the development of the unconformity (Ettensohn & Chesnut 1989) rather than to eustasy alone (Saunders & Ramsbottom 1986). These events in Euramerica and coincident inversion and volcanism in Gondwana (Gonzalez-Bonorino & Eyles 1995) mark the global convergence of plates and assembly of Pangaea.…”

Section: Implications For the Tectonic Histo~ Of Circum-atlantic Euramentioning

confidence: 99%

“…The driving mehanism of these sequences has been inferred to have been glacioeustacy (Giles 198 lb), possibly caused by the waxing and waning of the developing Gondwanan ice cap (Crowell 1978;Veevers & Powell 1987;Gonzalez-Bonorino & Eyles 1995). The Windsor transgressive-regressive cycles mimic the strong asymmetry of glacial ice-cap meltout and growth evidenced by the oxygen isotope record from Pleistocene ice (Chappell & Shackleton 1986).…”

Section: Visdanmentioning

confidence: 99%

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