An Ichnotaxonomic Approach to Wrinkled Microbially Induced Sedimentary Structures

Stimson, Matthew R.; Miller, Randall F.; MacRae, R. Andrew; Hinds, Steven J.

doi:10.1080/10420940.2017.1294590

Cited by 22 publications

(6 citation statements)

References 45 publications

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“…I, K, Lepidosigillaria whitei Kr€ ausel & Weyland (1949), corms with rootlets. J, Rugalichnus matthewiiStimson et al (2017). L, Palaeophycus tubularisHall (1847, right) and Planolites beverleyensis (Billings)Alpert (1975, left).…”

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confidence: 99%

REASSESSMENT OF THE DEVONIAN PROBLEMATICUM PROTONYMPHA AS ANOTHER POST-EDIACARAN VENDOBIONT

Retallack

2016

Geological Society of America Abstracts With Programs

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Protonympha is an enigmatic fossil represented by two species from the Middle Devonian (Protonympha transversa) and Late Devonian (Protonympha salicifolia) of New York. Although interpreted in the past as a polychaete worm or starfish arm, Protonympha is not found with marine fossils, but with fossil plants. This fossil plant community was a swamp woodland of Lepidosigillaria whitei, with ground cover of Haskinsia colophylla, fringing brackish to freshwater coastal lagoons of the Catskill Delta. Protonympha shares with Ediacaran Vendobionta a quilted body of unskeletonized biopolymer that is unusually resistant to burial compaction. In overall form, Protonympha is most like the Ediacaran genus Spriggina. Protonympha has branching and tapering tubular structures radiating from the bottom. These rhizine-like structures, thallus stratification and internal chambers revealed by petrographic thin sections suggest affinities with lichenized fungi. As for Cambrian Swartpuntia and Ordovician-Silurian Rutgersella, Protonympha may have been a post-Ediacaran vendobiont. □ Devonian, New York, Problematicum, Protonympha, vendobiont.

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mentioning

confidence: 99%

REASSESSMENT OF THE DEVONIAN PROBLEMATICUM PROTONYMPHA AS ANOTHER POST-EDIACARAN VENDOBIONT

Retallack

2016

Geological Society of America Abstracts With Programs

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“…Lack of articulate brachiopods or trilobites, and the presence of O. magnifica (Herrick) Schuchert () and microbial wrinkle structures ( Rugalichnus matthewii Stimson et al . ) can be taken as indications of brackish intertidal water, as inferred elsewhere in Devonian rocks (Bjerstedt ; Mata & Bottjer ). Paropsonema cryptophya (Clarke ) is a problematic unskeletonized discoid fossil, not examined during this study.…”

Section: Methodsmentioning

confidence: 83%

“…J, Rugalichnus matthewii Stimson et al . (). L, Palaeophycus tubularis Hall (, right) and Planolites beverleyensis (Billings) Alpert (, left).…”

Section: Methodsmentioning

confidence: 97%

Reassessment of the Devonian problematicum Protonympha as another post-Ediacaran vendobiont

Retallack

2018

LET

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Protonympha is an enigmatic fossil represented by two species from the Middle Devonian (Protonympha transversa) and Late Devonian (Protonympha salicifolia) of New York. Although interpreted in the past as a polychaete worm or starfish arm, Protonympha is not found with marine fossils, but with fossil plants. This fossil plant community was a swamp woodland of Lepidosigillaria whitei, with ground cover of Haskinsia colophylla, fringing brackish to freshwater coastal lagoons of the Catskill Delta. Protonympha shares with Ediacaran Vendobionta a quilted body of unskeletonized biopolymer that is unusually resistant to burial compaction. In overall form, Protonympha is most like the Ediacaran genus Spriggina. Protonympha has branching and tapering tubular structures radiating from the bottom. These rhizine‐like structures, thallus stratification and internal chambers revealed by petrographic thin sections suggest affinities with lichenized fungi. As for Cambrian Swartpuntia and Ordovician–Silurian Rutgersella, Protonympha may have been a post‐Ediacaran vendobiont.

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“…These putative interbed MISS or microbial wrinkles are listed here because they co-occur with a variety of other Drakensberg fossils (e.g. plant impressions, tracks) as well as sedimentary structures indicative of shallow water conditions, and as such are considered trace fossils (see Stimson et al 2017). Microbial wrinkles are common in low-energy, aquatic settings in various continental environments as well (e.g.…”

Section: B Palaeofaunamentioning

confidence: 99%

Life and land engulfed in the late Early Jurassic Karoo lavas of southern Gondwana

et al. 2022

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The rock record from the late Early Jurassic in southern Africa encompasses the history of voluminous continental flood basalt outpourings associated with the magmatic events in the Karoo–Ferrar Large Igneous Province (LIP) in southern and eastern Gondwana. This multiphase magmatism produced one of Earth’s largest continental flood basalt successions volumetrically and is assumed to have been a main driving mechanism in late Early Jurassic global environmental perturbations, including mass extinctions and changes in climate. In southern Africa, these Lower Jurassic flood basalts are interbedded with fossiliferous sedimentary rocks, which in turn host the last signs of ‘Karoo life’ in the form of fossil plants, invertebrates and vertebrates, including the trackways of hopping mammals and the ultimate Karoo dinosaurs. The sedimentology and palaeontology of the interbeds archived depositional and biotic processes in running water as well as in and around shallow, up to ∼10 m deep freshwater lakes and ponds in the late Early Jurassic. This study explains how a complex freshwater palaeo-habitat prevailed – albeit temporarily – in this extremely stressful environment, which was unlike any modern volcanic system. The evidence collectively points to seasonally wet, warm temperate climatic conditions during the early phases of Karoo volcanism. Moreover, the evidence in the rocks also suggests that the dynamic volcanic conditions resulted in shifting habitats that likely facilitated the migration of the ultimate Karoo biota towards the north and west, away from the main Karoo land of fire, just before Gondwana started to disassemble. This refinement of the environmental dynamics in southern Gondwana presented herein lays the groundwork for future high-resolution volcanological, geochronological and chemostratigraphical studies aimed at the nuanced understanding of the global environmental effect of the Karoo–Ferrar LIP.

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An Ichnotaxonomic Approach to Wrinkled Microbially Induced Sedimentary Structures

Cited by 22 publications

References 45 publications

REASSESSMENT OF THE DEVONIAN PROBLEMATICUM PROTONYMPHA AS ANOTHER POST-EDIACARAN VENDOBIONT

REASSESSMENT OF THE DEVONIAN PROBLEMATICUM PROTONYMPHA AS ANOTHER POST-EDIACARAN VENDOBIONT

Reassessment of the Devonian problematicum Protonympha as another post-Ediacaran vendobiont

Life and land engulfed in the late Early Jurassic Karoo lavas of southern Gondwana

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