Trace fossils, sedimentary facies and parasequence architecture from the Lower Cretaceous Mulichinco Formation of Argentina: The role of fair-weather waves in shoreface deposits

An exposure of the Lower Cretaceous Robbedale Formation adjacent to the Rønne Golf Course, Bornholm, has permitted a more detailed study of the trace fossils than has been made hitherto. A lithofacies analysis indicates that the sediments were deposited on the lower to upper shore face in a wave dominated barred coastal environment. The following trace fossils are present: Conichnus conosinus isp. n., Cylindrichnus isp., Ophiomorpha nodosa, Skolithos Hnearis, Teichichnus rectus, Thalassinoides suevicus forms 1 and 2. These seven trace fossils are contained in nine ichnofabrics. The ichnofabrics are closely related to sedimentary faciès and suggest a shallow marine sedimentary environment. The abiotic factors, sediment stability and grain size, probably affected the distribution of ichnofabrics by controlling the occurrence of trace makers and their behaviour. Associated with Ophiomorpha nodosa at one horizon are a series of trace fossils that may be interpreted as fodinichnial structures. They somewhat resemble "rayholes". The available nomenclature for such structures is discussed and the name Conichnus conosinus isp. n. is proposed.

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PROBABLE AVIAN FEEDING TRACE FOSSILS FROM THE CEDAR MOUNTAIN FORMATION (LOWER CRETACEOUS), UTAH USA

10.1130/abs/2018am-318336 ◽

2018 ◽

Author(s):

Anthony J. Martin ◽

◽

James I. Kirkland ◽

Donald D. DeBlieux ◽

Vincent L. Santucci ◽

...

Keyword(s):

Lower Cretaceous ◽

Trace Fossils ◽

Cedar Mountain Formation ◽

Feeding Trace

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Depositional, diagenetic and stratigraphic aspects of Macaé Group carbonates (Albian): example from an oilfield from Campos Basin

Brazilian Journal of Geology ◽

10.1590/23174889201500020005 ◽

2015 ◽

Vol 45 (2) ◽

pp. 243-258 ◽

Cited By ~ 11

Author(s):

Juliana Okubo ◽

Ricardo Lykawka ◽

Lucas Veríssimo Warren ◽

Julia Favoreto ◽

Dimas Dias-Brito

Keyword(s):

Deep Water ◽

Carbonate Rocks ◽

Facies Analysis ◽

Sedimentary Facies ◽

Fair Weather ◽

Thin Sections ◽

Carbonate Sedimentation ◽

Diagenetic Processes ◽

Campos Basin ◽

Facies Associations

<p>Carbonate rocks from the Macaé Group (Albian) represent an example of carbonate sedimentation related to the drift phase in Campos Basin. This study presents depositional features, integrating them with diagenetic and stratigraphic aspects of the Macaé Group carbonates including the upper part of the Quissamã Formation and the lower part of the Outeiro Formation. Macroscopic analyses in cores and microscopic ones in thin sections allowed the recognition of eleven sedimentary facies - nine of them corresponding to the Quissamã Formation and two of them representing the Outeiro Formation. These facies were grouped into five facies associations. Oolitic grainstones and oncolitic grainstones are interpreted to be deposited in shallow depth probably in shoals above the fair weather wave base. The interbanks between shoals were formed in less agitated waters and characterized by deposition of peloidal bioclastic packstones and wackestones representative of sedimentation in calm waters. Bioclastic packstones and oolitic packstones/wackestones represent allochthonous deposits related to the beginning of the regional drowning that occur in upper Quissamã Formation. Pithonellids wackestones and bioclastic wackestones with glauconite are related to deep water deposits, characteristics of the Outeiro Formation. Post-depositional features revealed the action of diagenetic processes as, micritization, cimentation, dissolution, compaction, dolomitization and recrystallization occurred during the eo- and mesodiagenesis phases. Vertical facies analysis suggests shallowing upward cycles stacked in a sequence progressively deeper towards the top (from the Quissamã Formation to the Outeiro Formation).</p>

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Palaeoenvironmental significance of storm coquinas in a Lower Cretaceous coastal lagoonal succession (Vectis Formation, Isle of Wight, southern England)

Geological Magazine ◽

10.1017/s0016756800003782 ◽

2000 ◽

Vol 137 (2) ◽

pp. 193-205 ◽

Cited By ~ 13

Author(s):

JONATHAN D. RADLEY ◽

MICHAEL J. BARKER

Keyword(s):

High Resolution ◽

Principal Components ◽

Lower Cretaceous ◽

Coastal Lagoons ◽

Trace Fossils ◽

Isle Of Wight ◽

Southern England ◽

Desiccation Cracks ◽

Stratigraphic Framework

Thin bioclastic limestone beds (‘coquinas’) in the Vectis Formation (Wealden Group, Lower Cretaceous) of the Isle of Wight, southern England, exhibit a range of biofabrics and internal stratigraphies. These features are attributed to both simple and complex storm deposition of allochthonous biogenic and siliciclastic materials in coastal lagoons and on adjacent mudflats. These modes of deposition facilitated preservation of dinosaur trackways, desiccation cracks, shallow-tier trace fossils and in situ bivalve colonies through rapid burial. The coquinas thus preserve a record of surficial muds, commonly lost through reworking. The principal components of the coquinas comprise dispersed elements from within the argillaceous ‘background’ facies. Some of these beds are laterally traceable for up to 27 km, providing the foundations for a high-resolution event-stratigraphic framework.

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Raymond Charles Casey. 10 October 1917—26 April 2016

Biographical Memoirs of Fellows of the Royal Society ◽

10.1098/rsbm.2019.0050 ◽

2020 ◽

Vol 68 ◽

pp. 71-86 ◽

Cited By ~ 1

Author(s):

Peter F. Rawson ◽

Adrian W. A. Rushton ◽

Martin I. Simpson

Keyword(s):

Great Britain ◽

Soviet Union ◽

Lower Cretaceous ◽

Geological Survey ◽

Time Service ◽

Similar Role ◽

Home Town ◽

The Soviet Union ◽

Spare Time

Raymond Casey was an internationally recognized expert in two entirely different fields—geology and philately. He achieved this despite leaving school at 14. By then he was already collecting and studying fossils from his home town, Folkestone, and in 1939, despite not having a degree, he obtained a post with the Geological Survey of Great Britain in the modest role of assistant to C. J. Stubblefield. After war-time service in the RAF, he returned to the Survey in a similar role, but spent much of his ‘spare time’ researching and publishing on Lower Cretaceous palaeontology and stratigraphy. His fortunes began to change when, at the age of 38, he was admitted to Reading University to study for a doctorate. His thesis on Lower Greensand stratigraphy and palaeontology was recognized as an outstanding study that led to major publications including a nine-part monograph of the ammonite faunas. Then, in the late 1950s, he also began to study faunas from Jurassic–Cretaceous boundary beds in eastern England as part of his official work and this led to him visiting the Soviet Union on several occasions from 1963 onward. On the first visit he met the academician Nalivkin in Leningrad, who, as well as being an eminent geologist, was a keen philatelist. This led to Raymond taking an enthusiastic interest in pre-revolutionary Russian postal history, which resulted in numerous publications and awards and, after his retirement, became his main focus of interest.

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Trace fossils associated with Burgess Shale non-biomineralized carapaces: bringing taphonomic and ecological controls into focus

Royal Society Open Science ◽

10.1098/rsos.172074 ◽

2019 ◽

Vol 6 (1) ◽

pp. 172074 ◽

Cited By ~ 4

Author(s):

M. Gabriela Mángano ◽

Christopher David Hawkes ◽

Jean-Bernard Caron

Keyword(s):

Numerical Model ◽

Mechanical Stress ◽

Initial Phase ◽

Trace Fossils ◽

Trophic Levels ◽

Ecological Significance ◽

Burgess Shale ◽

Middle Cambrian ◽

Branching Patterns

The association of trace fossils and non-biomineralized carapaces has been reported from Cambrian Lagerstätten worldwide, but the abundance, ichnodiversity, taphonomy and ecological significance of such associations have yet to be fully investigated. Two main end-member hypotheses are explored based on the study of a relatively wide variety of trace fossils preserved associated to Tuzoia carapaces from the middle Cambrian Burgess Shale in British Columbia. In the ecological Tuzoia garden hypothesis, the bacterially enriched surface of carapaces provides opportunities for intricate ecologic interactions among trophic levels. In the taphonomic shielding hypothesis, the trace fossil–carapace association results from preferential preservation of traces as controlled by compaction independent of any association in life. In an attempt to better understand the role of the carapace as a medium for preservation of trace fossils and to evaluate the effects of mechanical stress related to burial, a numerical model was developed. Results indicate that the carapace can shield underlying sediment from mechanical stress for a finite time, differentially protecting trace fossils during the initial phase of burial and compaction. However, this taphonomic model alone fails to fully explain relatively high-density assemblages displaying a diversity of structures spatially confined within the perimeter of carapaces or branching patterns recording re-visitation.

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Sedimentary and Paleoclimatic Controls on Caddisfly (Insecta: Trichoptera) Assemblages during the Last Interglacial-to-Glacial Transition in Southern Ontario

Quaternary Research ◽

10.1006/qres.1995.1009 ◽

1995 ◽

Vol 43 (1) ◽

pp. 90-105 ◽

Cited By ~ 9

Author(s):

Nancy E. Williams ◽

Nicholas Eyles

Keyword(s):

Species Richness ◽

Sedimentary Facies ◽

Weather Conditions ◽

Climatic Conditions ◽

Last Interglacial ◽

Fair Weather ◽

Southern Ontario ◽

Valley Site ◽

Climatic Cooling ◽

Temperate River

AbstractSouthern Ontario, Canada, has late Pleistocene deposits that contain evidence for climatic cooling during the last interglacial/glacial transition and much of the succeeding Wisconsin glaciation. Fossils of lacustrine and riverine caddisflies (Insecta: Trichoptera) are abundant and well-preserved in these deposits. We examined 26 samples from the interglacial section exposed in the Don Valley Brickyard and compared their caddisfly assemblages with those recovered from the overlying early Wisconsin Scarborough Formation deposits at nearby Scarborough Bluffs. Fifty-one caddisfly taxa in 16 families were recovered from the Don Valley site. Fossil abundance and species richness appear related to the storm or fair-weather conditions inferred from the sedimentary facies. Caddisfly fossils were most abundant and species richness highest in fair-weather, peaty, rippled sands. Highest proportions of river species as opposed to lake species were recovered from sands (storm and fair-weather). Assemblages from both sites indicate the presence of a large and productive river flowing into ancestral Lake Ontario. However, the river assemblage appeared to be far more sensitive to environmental change than the relatively stable assemblage representing the thermally buffered lake. Warm temperate river species such as Hydropsyche bidens, Hydropsyche mississippiensis, Macrostemum carolina, and Potamyia flava are present in the lower Don samples but absent from the Scarborough Bluffs deposits, while indicators of cooler than present climatic conditions such as Arctopsyche Indogensis and Hagenella canadensis are present in the Scarborough Bluffs sediments but absent from the lower Don samples. For the interval from about 80,000 to 55,000 yr B.P., we infer a climatic cooling from temperature about 2°C warmer than present to about 3°C cooler than present.

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Latest Devonian–Earliest Mississippian nearshore trace-fossil assemblages from West Virginia, Pennsylvania, and Maryland

Journal of Paleontology ◽

10.1017/s0022336000029279 ◽

1987 ◽

Vol 61 (5) ◽

pp. 865-889 ◽

Cited By ~ 25

Author(s):

Thomas W. Bjerstedt

Keyword(s):

West Virginia ◽

Trace Fossils ◽

Price Formation ◽

Late Devonian ◽

Tidal Channel ◽

Fair Weather ◽

The West ◽

North Central ◽

The North ◽

Channel Systems

Trace fossils are used in deposystem analysis of Late Devonian–Early Mississippian nearshore facies in the north-central Appalachian Basin. These nearshore facies resulted from separate transgressions during latest Devonian (Cleveland Shale) and earliest Mississippian (Sunbury Shale) time. Emphasis is placed on a well-exposed section at Rowlesburg, West Virginia, where the Oswayo, Cussewago Sandstone, and Riddlesburg Shale Members of the Price Formation are exposed.The Oswayo Member at Rowlesburg preserves an offshore-to-lower shoreface transition in a complex of euryhaline, protected-bay, lagoon, and possible estuarine facies. Cruziana is common and occurs along with Arthrophycus, Bifungites, Chondrites, Planolites, Palaeophycus, Rhizocorallium, Rosselia, Rusophycus, and Skolithos in intensely bioturbated mudstone, siltstone, and sandstone. These lithologies were deposited below fair-weather wave base and grade upsection to upper shoreface facies comprised of thick, horizontally-laminated sandstones with thinner, burrowed mudstone interbeds. Upper shoreface traces consist of Arenicolites, Cruziana, Diplocraterion, Dimorphichnus, Planolites, Thalassinoides, and Skolithos. Skolithos “pipe rock” sandstones occur at the toe of upper shoreface facies. Eastward the Oswayo Member grades into a restricted-bay facies and finally into beach and tidal flat facies near its stratigraphic wedge-out in eastern West Virginia and western Maryland. The Cussewago Sandstone Member at Rowlesburg overlies the Oswayo and is bounded at the top by a disconformity. The Cussewago contains Arenicolites, Isopodichnus, Phycodes, Planolites, and Skolithos in upper shoreface sandstones possibly related to deposition in deltaic or tidal channel systems.Regionally, the Riddlesburg Shale records a range of euryhaline environments in shallow-shelf, open-bay, and probable estuarine facies. The Riddlesburg Shale Member at Rowlesburg is comprised of dark-grey silty shales, siltstones, and hummocky cross-stratified sandstones. Trace fossils include Bergaueria, Bifungites, Fustiglyphus?, Helminthopsis, Planolites, and Skolithos. Lithofacies of the Riddlesburg Shale in West Virginia were markedly influenced by a syndepositionally active basement feature, the West Virginia Dome. Riddlesburg-age shoreface sandstones deposited on the crest of the Dome contain apparent omission surfaces with common Rhizocorallium and Arenicolites, Cruziana?, Planolites, and Skolithos.

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