Paleoenvironmental conditions of Early Miocene corals, western Makran, Iran

Ghaedi, Mehdi; Johnson, Kenneth G.; Yazdi, Mehdi

doi:10.1007/s12517-016-2712-3

Cited by 8 publications

(14 citation statements)

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“…From the Palaeocene to middle Miocene, a prograding clastic wedge evolved, including successions shallowing upward from deep-water turbidites into slope and shelf deposits (Crimes and McCall 1995 ; Burg et al 2008 ). The herein presented gastropod fauna was mainly collected along a continuous stratigraphic section in marginal and shallow marine mixed siliclastic-carbonate sediments of early Miocene age that are exposed near Irer village at the eastern flank of the Band-e-Chaker Syncline in the Western Makran (N 26°40′55.26′′, E 057°56′1.72′′; Irer locality of Ghaedi et al 2016 ) (Fig. 1 ).…”

Section: Geological Settingmentioning

confidence: 99%

“…The next sedimentary unit is 11 m thick and consists of marls, calcareous marls and argillaceous limestones, which formed in shallow subtidal environments. It is conformably overlain by marly coral limestones (13 m thick) with characteristic sheet and platestone growth fabrics (sensu Insalaco 1998 ) which have been interpreted as turbid water reef (Ghaedi et al 2016 ). The Irer section continues with an at least 20-m-thick succession of grey-green marls with thin, randomly distributed interbeds of calcareous marl that is devoid of macrofossils.…”

Section: Geological Settingmentioning

confidence: 99%

“…The Irer section continues with an at least 20-m-thick succession of grey-green marls with thin, randomly distributed interbeds of calcareous marl that is devoid of macrofossils. In terms of lithostratigraphy, the upper part of the Irer section, including the coral limestones and the overlying grey-green marls, was assigned to the Burdigalian Band-e-Chaker Formation by Ghaedi et al ( 2016 ). This Burdigalian age is biostratigraphically confirmed by the presence of the foraminifer Miogypsina globulina in the coral-limestone unit (Ghaedi et al 2016 ).…”

Section: Geological Settingmentioning

confidence: 99%

“…The early Miocene mollusc assemblages from the Iranian Makran might thus be expected to reflect the coincident biogeographic separation of marine faunas. Whereas the early Miocene coral fauna of the Iranian Makran is fairly well studied (McCall et al 1994 ; Ghaedi et al 2016 ), the mollusc fauna of the Proto-Persian Gulf have not attracted any attention so far. Therefore, herein we describe gastropod assemblages collected along a long section of the Band-e-Chaker Formation, which comprises siliciclastic peri-tidal deposits and coral-reef carbonates, which formed on the Makran shelf during the Burdigalian (Ghaedi et al 2016 ).…”

Section: Introductionmentioning

confidence: 99%

“…Whereas the early Miocene coral fauna of the Iranian Makran is fairly well studied (McCall et al 1994 ; Ghaedi et al 2016 ), the mollusc fauna of the Proto-Persian Gulf have not attracted any attention so far. Therefore, herein we describe gastropod assemblages collected along a long section of the Band-e-Chaker Formation, which comprises siliciclastic peri-tidal deposits and coral-reef carbonates, which formed on the Makran shelf during the Burdigalian (Ghaedi et al 2016 ). These assemblages allow a realistic estimate of the effect of the Tethyan closure on faunal exchange between the Proto-Mediterranean Sea and the northern Indian Ocean.…”

Section: Introductionmentioning

confidence: 99%

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Early Miocene reef- and mudflat-associated gastropods from Makran (SE-Iran)

Harzhauser

Reuter

Piller

2017

PalZ

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A new gastropod fauna of Burdigalian (early Miocene) age is described from the Iranian part of Makran. The fauna comprises 19 species and represents three distinct assemblages from turbid water coral reef, shallow subtidal soft-bottom and mangrove-fringed mudflat environments in the northern Indian Ocean. Especially the reef-associated assemblage comprises largely new species. This is explained by the rare occurrence of reefs along the northern margin of the Miocene Indian Ocean and the low number of scientific studies dealing with the region. In terms of paleobiogeography, the fauna corresponds well to coeval faunas from the Pakistani Balochistan and Sindh provinces and the Indian Kathiawar, Kutch and Kerala provinces. During the early Miocene, these constituted a discrete biogeographic unit, the Western Indian Province, which documents the near complete biogeographic isolation from the Proto-Mediterranean Sea. Some mudflat taxa might represent examples of vicariance following the Tethys closure. The fauna also displays little connection with coeval faunas from Indonesia, documenting a strong provincialism within the Indo-West Pacific Region during early Miocene times. Neritopsis gedrosiana sp. nov., Calliostoma irerense sp. nov., Calliostoma mohtatae sp. nov. and Trivellona makranica sp. nov. are described as new species.

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Section: Geological Settingmentioning

confidence: 99%

Section: Geological Settingmentioning

confidence: 99%

Section: Geological Settingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Early Miocene reef- and mudflat-associated gastropods from Makran (SE-Iran)

Harzhauser

Reuter

Piller

2017

PalZ

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Palaeocene to Miocene southern Tethyan carbonate factories: A meta‐analysis of the successions of South‐western and Western Central Asia

Coletti

Commissario

Mariani

et al. 2022

The Depositional Record

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High coral reef connectivity across the Indian Ocean is revealed 6–7 Ma ago by a turbid-water scleractinian assemblage from Tanzania (Eastern Africa)

et al. 2019

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The present centre of coral diversity in the Western Indian Ocean is defined by the northern Mozambique Channel with an extension northward to Mafia Island in Tanzania (Eastern Africa). The geological and evolutionary history of this hotspot of marine biodiversity remains so far completely obscure, because Cenozoic fossil reef communities of this area are not well known. This study presents a new fossil scleractinian fauna from the Mikindani Formation in southern Tanzania. It comprises 16 symbiotic coral taxa of which nine could be identified to the species and five to the genus level. Coral habitat consisted of low-relief biostromes that developed in shallow water at the front of the Rovuma Delta under conditions of variable sediment input. The biostromes are dated to be Messinian based on associated calcareous nannoplankton and planktic foraminifers. The studied coral assemblage shows close affinities with the Recent Western Indian Ocean biogeographic province and Central Indo-West Pacific biogeographic region as well as with the Miocene of Indonesia. Faunistic relations with the Oligocene-early Miocene of Somalia and Iran do not exist. The patterns of species distribution document a major palaeobiogeographic change in the Indian Ocean that correlates with the onset of the Miocene Indian Ocean Equatorial Jet during the middle Miocene. The clear Indonesian affinity of the Messinian coral fauna from southern Tanzania implies that this westerly oceanic surface current provided high biogeographic connectivity across the Indian Ocean during the late Miocene. Today, the coastal waters of Indonesia are located in the Coral Triangle. Diversification of this global epicentre of marine biodiversity started in the early Miocene and it was established already during the middle Miocene. Our results indicate that the East African hotspot of coral biodiversity originated as an offshoot of the Coral Triangle in the middle to late Miocene.Electronic supplementary materialThe online version of this article (10.1007/s00338-019-01830-8) contains supplementary material, which is available to authorized users.

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Paleoenvironmental conditions of Early Miocene corals, western Makran, Iran

Cited by 8 publications

References 86 publications

Early Miocene reef- and mudflat-associated gastropods from Makran (SE-Iran)

Early Miocene reef- and mudflat-associated gastropods from Makran (SE-Iran)

Palaeocene to Miocene southern Tethyan carbonate factories: A meta‐analysis of the successions of South‐western and Western Central Asia

High coral reef connectivity across the Indian Ocean is revealed 6–7 Ma ago by a turbid-water scleractinian assemblage from Tanzania (Eastern Africa)

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