Two fossilized swamps containing in situ Sphenophyta stems, rhizomes, and root systems from the Middle Jurassic Hojedk Formation, Kerman area (Iran)

Khalilizadeh, Hadis; Ashouri, Ali Reza; Ghaderi, Abbas; Barbacka, Mária

doi:10.1007/s12549-022-00528-0

Cited by 3 publications

(4 citation statements)

References 32 publications

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“…Correspondingly, fossil swamps have recently been reported from the Hojedk Formation of the Kerman area, southern Tabas Block (Khalilizadeh et al . 2022). In the lower to middle parts of the succession at Kalshaneh, the fluvial channels are mostly isolated within floodplain deposits, whereas in the upper part, the channels are more stacked and coalesced, suggesting a certain change in the fluvial regime that needs explaining (see section below).…”

Section: Discussionmentioning

confidence: 99%

“…Nilssonia sp., Ginkgoales sp. ; Vaez-Javadi, 2016) typical of a humid subtropical to temperate climate, and Khalilizadeh et al (2022) documented extensive swamps for the Hojedk Formation of the Kerman area. Such conditions might have removed unstable lithic grains, thus increasing the quartz content and maturity of sandstones (e.g.…”

Section: B Provenance and Potential Source Areamentioning

confidence: 99%

“…On the other hand, there are numerous studies on the macrofloras and palynology of the Hojedk Formation from several locations on the Tabas Block (e.g. Hashemi-Yazdi et al 2014;Vaez-Javadi, 2016;Khalilizadeh et al 2019Khalilizadeh et al , 2022, providing important climatic and palaeoenvironmental information. The Middle Jurassic Hojedk Formation is of major importance for understanding the regional geodynamic and palaeoclimatic evolution of the Cimmerian terranes in east-central Iran that represent a crucial part of a larger superimposed orogenic belt that extended from the Iran Plate to southeast Asia (e.g.…”

Section: Introductionmentioning

confidence: 99%

“…2019; Khalilizadeh et al . 2019, 2022), providing important climatic and palaeoenvironmental information. The Middle Jurassic Hojedk Formation is of major importance for understanding the regional geodynamic and palaeoclimatic evolution of the Cimmerian terranes in east-central Iran that represent a crucial part of a larger superimposed orogenic belt that extended from the Iran Plate to southeast Asia (e.g.…”

Section: Introductionmentioning

confidence: 99%

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Depositional and thermal history of a continental, coal-bearing Middle Jurassic succession from Iran: Hojedk Formation, northern Tabas Block

SALEHI

Wilmsen²,

Zamanian³

et al. 2022

Geol. Mag.

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During the early Bajocian, a conspicuous coal-bearing siliciclastic succession was deposited in the northern Tabas Bock, which is important for understanding the regional geodynamics of the Central-East Iranian Microcontinent (CEIM) as well as for the Jurassic coal genesis in this part of Laurasia. Sedimentary facies analysis in a well-exposed section of the lower Bajocian Hojedk Formation (Kalshaneh area, northern Tabas Block) led to the recognition of ten characteristic sedimentary facies and three facies associations, representing channels with point bars and floodplains of a Bajocian meandering river system. Modal analysis indicates that the mature quartz arenites and quartzo-lithic sandstones of the Hojedk Formation originated from the erosion and recycling of older, supracrustal sedimentary rocks on the Yazd Block to the west. The coal petrography and maturity show an advanced maturation stage, whereas the great thickness of these continental strata points to a pronounced extension-related subsidence in the northern Tabas Block. The rapid rate of differential subsidence can be explained by accelerated normal block-faulting in the back-arc extensional basin of the CEIM, facing the Neotethys to the south. Compared to the thick Jurassic, the post-Jurassic strata are relatively thin and played a limited role in the thermal history of the coal in the northern Tabas Block. A relatively high geothermal gradient in the tectonically highly mobile area of the northern Tabas Block and/or heating by regionally widespread Palaeogene intrusions were most probably the key drivers of the thermal maturation of the Middle Jurassic coals.

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Section: Discussionmentioning

confidence: 99%

Section: B Provenance and Potential Source Areamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Depositional and thermal history of a continental, coal-bearing Middle Jurassic succession from Iran: Hojedk Formation, northern Tabas Block

SALEHI

Wilmsen²,

Zamanian³

et al. 2022

Geol. Mag.

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Gymnosperm Foliage from the Lower Jurassic of Jirande Area, Western Alborz Mountain, North Iran

et al. 2023

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The Proterozoic–Cambrian salt detachment zone at Lakhar Kuh, Iran: a seismic-scale analogue for salt stringers, detachment folding and multiphase structural development

Morley,

Back

2024

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In the Middle East, significant evaporite units formed in the latest Precambrian-Cambrian, Triassic, Jurassic, Cretaceous, and Cenozoic. The Precambrian-Cambrian period gave rise to the Ara Salt carbonate stringer plays, southern Oman and the giant Zagros anticline traps (Hormuz Formation). While outcrops of salt diapirs are common, basal detachment exposures are extremely rare. The Lakar Kuh area of Central Iran reveals the Precambrian-Cambrian basal salt detachment, on satellite images, in natural cross-section view through the entire Phanerozoic sedimentary section east of Ravar. This view illustrates how older diapiric structures (pillows, and normal faults) were the focus of later contractional folds particularly in the Jurassic and Cenozoic. The salt detachment zone contains many floating blocks (stringers) of clastic, carbonate and igneous rocks. Some blocks were stoped from the overlying beds, while most were layers originally interbedded with the evaporites. Block size, distribution and orientation is highly variable, folding is infrequent. Lakar Kuh encompasses several key themes generally pertinent to structural geology and salt system research: the presence of sedimentary stringers within evaporites, multiple detachment levels within a thick (>5 km) stratigraphic section, detachment folding, multi-phase salt activity, reactivation of older structures by newer ones, and multi-stage development of salt bodies.

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Two fossilized swamps containing in situ Sphenophyta stems, rhizomes, and root systems from the Middle Jurassic Hojedk Formation, Kerman area (Iran)

Cited by 3 publications

References 32 publications

Depositional and thermal history of a continental, coal-bearing Middle Jurassic succession from Iran: Hojedk Formation, northern Tabas Block

Depositional and thermal history of a continental, coal-bearing Middle Jurassic succession from Iran: Hojedk Formation, northern Tabas Block

Gymnosperm Foliage from the Lower Jurassic of Jirande Area, Western Alborz Mountain, North Iran

The Proterozoic–Cambrian salt detachment zone at Lakhar Kuh, Iran: a seismic-scale analogue for salt stringers, detachment folding and multiphase structural development

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