Ichnofossils of the Psilonichnus Ichnofacies and their paleoecological and paleoenvironmental significance in the Scottish Middle Jurassic.

P. Marshall, Nigel Harvey Trewin, Adrian John Hartley

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

In the Bathonian (Middle Jurassic) Kilmaluag Formation, Great Estuarine Group, on the Isle of Skye, northwest Scotland, are ichnofossils that can be attributed to the burrowing activity of semi-terrestrial crab-like animals. The ichnofossils are preserved within supralittoral breccia-conglomerates and littoral calcareous mudstones and micrites deposited in a closed and shallow, low-salinity to freshwater coastal-lagoon setting. The dominant ichnofossil assemblage is preserved in the supralittoral rocks and comprises variable burrow types forming an ichnocoenosis and assigned to the Psilonichnus ichnofacies. These ichnofossils potentially provide the earliest known record of crab activity and their physiological adaptation to survive in a semi-terrestrial environment. Burrow characteristics include enlarged funnel-shaped apertures, unlined walls, absence of branching or biogenic reworking, inclined to vertical, U- and L-shaped forms and possible basal dwelling chamber. The ichnofossil assemblage preserved in the littoral rocks is attributed to the activity of either semi-terrestrial crabs or shrimps. Ichnofaunal characteristics reveal unique aspects of the paleoenvironments and paleoecology of the tracemaking community, including climatic conditions, substrate characteristics, the possible influence of paleowater table levels, paleoshoreline position, spatial variation in burrow morphology and possible gregarious and territorial behavior.
Original languageEnglish
Pages (from-to)95-108
Number of pages13
JournalIchnos
Volume9
Issue number3-4
DOIs
Publication statusPublished - 2003

Fingerprint

ichnofacies
burrow
crab
Jurassic
micrite
Bathonian
terrestrial environment
coastal lagoon
paleoecology
burrowing
paleoenvironment
reworking
breccia
rock
conglomerate
mudstone
spatial variation
salinity
substrate
animal

Cite this

Ichnofossils of the Psilonichnus Ichnofacies and their paleoecological and paleoenvironmental significance in the Scottish Middle Jurassic. / Marshall, P.; Trewin, Nigel Harvey; Hartley, Adrian John.

In: Ichnos, Vol. 9, No. 3-4, 2003, p. 95-108.

Research output: Contribution to journalArticle

@article{94ecaa216a1d4e279adff8966378cd62,
title = "Ichnofossils of the Psilonichnus Ichnofacies and their paleoecological and paleoenvironmental significance in the Scottish Middle Jurassic.",
abstract = "In the Bathonian (Middle Jurassic) Kilmaluag Formation, Great Estuarine Group, on the Isle of Skye, northwest Scotland, are ichnofossils that can be attributed to the burrowing activity of semi-terrestrial crab-like animals. The ichnofossils are preserved within supralittoral breccia-conglomerates and littoral calcareous mudstones and micrites deposited in a closed and shallow, low-salinity to freshwater coastal-lagoon setting. The dominant ichnofossil assemblage is preserved in the supralittoral rocks and comprises variable burrow types forming an ichnocoenosis and assigned to the Psilonichnus ichnofacies. These ichnofossils potentially provide the earliest known record of crab activity and their physiological adaptation to survive in a semi-terrestrial environment. Burrow characteristics include enlarged funnel-shaped apertures, unlined walls, absence of branching or biogenic reworking, inclined to vertical, U- and L-shaped forms and possible basal dwelling chamber. The ichnofossil assemblage preserved in the littoral rocks is attributed to the activity of either semi-terrestrial crabs or shrimps. Ichnofaunal characteristics reveal unique aspects of the paleoenvironments and paleoecology of the tracemaking community, including climatic conditions, substrate characteristics, the possible influence of paleowater table levels, paleoshoreline position, spatial variation in burrow morphology and possible gregarious and territorial behavior.",
author = "P. Marshall and Trewin, {Nigel Harvey} and Hartley, {Adrian John}",
note = "Published online: 18 Jun 2010 Author affiliations Department of Geology and Petroleum Geology, University of Aberdeen, Meston Building, Kings College, Aberdeen AB24 3UE Scotland",
year = "2003",
doi = "10.1080/10420940290208199",
language = "English",
volume = "9",
pages = "95--108",
journal = "Ichnos",
issn = "1042-0940",
publisher = "Taylor and Francis Ltd.",
number = "3-4",

}

TY - JOUR

T1 - Ichnofossils of the Psilonichnus Ichnofacies and their paleoecological and paleoenvironmental significance in the Scottish Middle Jurassic.

AU - Marshall, P.

AU - Trewin, Nigel Harvey

AU - Hartley, Adrian John

N1 - Published online: 18 Jun 2010 Author affiliations Department of Geology and Petroleum Geology, University of Aberdeen, Meston Building, Kings College, Aberdeen AB24 3UE Scotland

PY - 2003

Y1 - 2003

N2 - In the Bathonian (Middle Jurassic) Kilmaluag Formation, Great Estuarine Group, on the Isle of Skye, northwest Scotland, are ichnofossils that can be attributed to the burrowing activity of semi-terrestrial crab-like animals. The ichnofossils are preserved within supralittoral breccia-conglomerates and littoral calcareous mudstones and micrites deposited in a closed and shallow, low-salinity to freshwater coastal-lagoon setting. The dominant ichnofossil assemblage is preserved in the supralittoral rocks and comprises variable burrow types forming an ichnocoenosis and assigned to the Psilonichnus ichnofacies. These ichnofossils potentially provide the earliest known record of crab activity and their physiological adaptation to survive in a semi-terrestrial environment. Burrow characteristics include enlarged funnel-shaped apertures, unlined walls, absence of branching or biogenic reworking, inclined to vertical, U- and L-shaped forms and possible basal dwelling chamber. The ichnofossil assemblage preserved in the littoral rocks is attributed to the activity of either semi-terrestrial crabs or shrimps. Ichnofaunal characteristics reveal unique aspects of the paleoenvironments and paleoecology of the tracemaking community, including climatic conditions, substrate characteristics, the possible influence of paleowater table levels, paleoshoreline position, spatial variation in burrow morphology and possible gregarious and territorial behavior.

AB - In the Bathonian (Middle Jurassic) Kilmaluag Formation, Great Estuarine Group, on the Isle of Skye, northwest Scotland, are ichnofossils that can be attributed to the burrowing activity of semi-terrestrial crab-like animals. The ichnofossils are preserved within supralittoral breccia-conglomerates and littoral calcareous mudstones and micrites deposited in a closed and shallow, low-salinity to freshwater coastal-lagoon setting. The dominant ichnofossil assemblage is preserved in the supralittoral rocks and comprises variable burrow types forming an ichnocoenosis and assigned to the Psilonichnus ichnofacies. These ichnofossils potentially provide the earliest known record of crab activity and their physiological adaptation to survive in a semi-terrestrial environment. Burrow characteristics include enlarged funnel-shaped apertures, unlined walls, absence of branching or biogenic reworking, inclined to vertical, U- and L-shaped forms and possible basal dwelling chamber. The ichnofossil assemblage preserved in the littoral rocks is attributed to the activity of either semi-terrestrial crabs or shrimps. Ichnofaunal characteristics reveal unique aspects of the paleoenvironments and paleoecology of the tracemaking community, including climatic conditions, substrate characteristics, the possible influence of paleowater table levels, paleoshoreline position, spatial variation in burrow morphology and possible gregarious and territorial behavior.

U2 - 10.1080/10420940290208199

DO - 10.1080/10420940290208199

M3 - Article

VL - 9

SP - 95

EP - 108

JO - Ichnos

JF - Ichnos

SN - 1042-0940

IS - 3-4

ER -