Patricia Corcoran

Patricia Corcoran
The University of Western Ontario | UWO · Department of Earth Sciences

Ph.D.

About

72
Publications
24,093
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
4,154
Citations
Citations since 2017
23 Research Items
3296 Citations
20172018201920202021202220230200400600
20172018201920202021202220230200400600
20172018201920202021202220230200400600
20172018201920202021202220230200400600
Introduction
Effects of climate, transport, source, and anthropogenic processes on the distribution, composition and degradation of sedimentary deposits
Additional affiliations
January 2003 - June 2020
The University of Western Ontario
Position
  • Chair

Publications

Publications (72)
Article
Full-text available
Plastic debris in Earth’s oceans presents a serious environmental issue because breakdown by chemical weathering and mechanical erosion is minimal at sea. Following deposition on beaches, plastic materials are exposed to UV radiation and physical processes controlled by wind, current, wave and tide action. Plastic particles from Kauai’s beaches wer...
Article
Microplastics are a source of environmental pollution resulting from degradation of plastic products and spillage of resin pellets. We report the amounts of microplastics from various sites of Lake Ontario and evaluate their potential for preservation in the sediment record. A total of 4635 pellets were sampled from the Humber Bay shoreline on thre...
Article
Microplastics (plastic particles <5 mm) are abundant in aquatic environments, particularly near urban areas. Little is known, however, about how variations in microplastic abundances within watersheds affect fishes. Microplastics were examined in demersal fishes—white sucker (Catostomus commersonii) and common carp (Cyprinus carpio)—across 11 sites...
Article
Offshore and nearshore sediment samples from Lake Huron, North America, were analysed for microplastics. Normalized abundances ranged from 59 to 335,714 particles per kg of dry weight sediment (p kg⁻¹ dw). Of the four main basins of Lake Huron, the North Channel contained the greatest microplastic abundances, averaging 47,398 p kg⁻¹ dw, followed by...
Article
Full-text available
The Laurentian Great Lakes system is a major global sink for plastic debris. An area of 10m2 on each of sixty-six Great Lakes beaches was sampled for large micro-, meso- and macroplastic items. A total of 21,592 plastic items were collected and categorized. Pre-production plastic pellets were the most abundant debris type, accounting for 58.3% of t...
Article
The Gordon Lake Formation of the Paleoproterozoic Huronian Supergroup is a siliciclastic-dominated succession ranging from 300 to 1100 m thick. Lithostratigraphic and sedimentological analysis of the formation in the Bruce Mines and Flack Lake areas, and Killarney and Lady Evelyn-Smoothwater provincial parks, Ontario, Canada, revealed seven lithofa...
Article
The Espanola Formation represents part of the lower Huronian Supergroup (2.45–2.2 Ga), which is interpreted to have been deposited in a restricted, fault-bound, intracontinental rift basin during Early Proterozoic episodes of crustal stretching and contemporaneous faulting along the southern margin of the Archean Superior Province. Field examinatio...
Article
Full-text available
The ubiquity and distribution of microplastics, particularly microfibres, in outdoor and indoor environments makes it challenging when assessing and controlling background contamination, as atmospheric particles can be unintentionally introduced into a sample during laboratory analysis. As such, an intra-laboratory examination and literature review...
Article
Full-text available
Re: Huntington A, Corcoran PL, Jantunen L, Thaysen C, Bernstein S, Stern GA, and Rochman CM. 2020. A first assessment of microplastics and other anthropogenic particles in Hudson Bay and the surrounding eastern Canadian Arctic waters of Nunavut. FACETS 5: 432–454. 10.1139/facets-2019-0042 In the originally published article, the Longitude and latit...
Article
Full-text available
Industrial, pre-consumer pellets are a major type of plastics pollution found on shorelines worldwide. This study investigates the distribution and characteristics of plastic pellets accumulated on beaches of the Laurentian Great Lakes of North America and provides a “snapshot” of pellet distribution in a lake system that accounts for 21% of the wo...
Article
The Espanola Formation of the Paleoproterozoic Huronian Supergroup is a mixed carbonate-siliciclastic succession that is well exposed in the Bruce Mines-Elliot Lake Area, Ontario, Canada. The siliciclastic portion of the formation is mainly dominated by shale with subordinate content of wake and arkose. Elemental geochemical analysis of the rocks w...
Article
Full-text available
Microplastics are a globally ubiquitous contaminant, invading the most remote regions, including the Arctic. To date, our understanding of the distribution and sources of microplastics in the Arctic is limited but growing. This study aims to advance our understanding of microplastics in the Arctic. Surface water, zooplankton, sediment, and snow sam...
Article
First documented in 2014, plastiglomerate continues to proliferate across the Earth’s surface. While these materials represent long-lasting symbols of anthropogenic impacts on the environment, they also highlight the need to address the global plastic crisis.
Article
Investigations of microplastic abundances in freshwater environments have become more common in the past five years, but few studies concern the factors that control the distribution of microplastics in river systems. We sampled benthic sediment from 34 stations along the Thames River in Ontario, Canada, to determine the influence of land use, grai...
Article
This paper considers how an interdisciplinary approach to the “wicked problem” of plastics pollution offers unique and important collaborative possibilities. Specially, the paper considers the approach of the Synthetic Collective, a group comprising artists, humanities scholars, and scientists. Considering first how artists and scientists might res...
Article
Sediment samples were collected from nearshore, tributary and beach environments within and surrounding the northern part of Lake Erie, Ontario to determine the concentrations and distribution of microplastics. Following density separation and microscopic analysis of 29 samples, a total of 1178 microplastic particles were identified. Thirteen nears...
Article
Detrital zircon U-Pb ages from one sandstone and one claystone unit in the upper Huronian Supergroup, near Flack Lake, Ontario, Canada, provide new evidence for the maximum depositional age of the two youngest formations and reinterpretation of the depositional history of the upper Huronian Supergroup. The average age of the youngest zircon grains...
Article
An exposure of the Paleoproterozoic Gordon Lake Formation in the Bruce Mines area, Ontario, Canada, contains abundant soft-sediment deformation structures (SSDS), including load casts, convolute bedding, pseudonodules, ball-and-pillow structures, flame structures and one dewatering pipe. These features are developed in siltstone to fine-grained san...
Chapter
The global persistence of plastic debris coupled with enormous and ever-increasing production rates of plastic materials has led to its designation as a symbol of anthropogenic influence on Earth's natural processes. Entombing plastic in landfills and under newly built urban structures aids with burial, as does increasing its density by adding func...
Article
The Gowganda Formation of the 2.45–2.2 Ga Huronian Supergroup contains glacially-induced, varve-like rhythmites that potentially preserve a detailed record of climatic conditions during the Paleoproterozoic Era. Four rhythmic couplet thickness records were measured at two outcrops near Wharncliffe, Ontario for the purpose of time-series analysis. T...
Article
Microplastics contamination of Lake Ontario sediments is investigated with the aim of identifying distribution patterns and hotspots in nearshore, tributary and beach depositional environments. Microplastics are concentrated in nearshore sediments in the vicinity of urban and industrial regions. In Humber Bay and Toronto Harbour microplastic concen...
Article
The Paleoproterozoic Gordon Lake and Bar River formations, Huronian Supergroup, contain a variety of sedimentary structures in the Flack Lake area of Ontario, Canada, that have been considered of debatable origin. We identify these structures as microbially induced sedimentary structures (MISS). The preserved MISS are related to microbial mat destr...
Article
The rise of plastics since the mid-20th century, both as a material element of modern life and as a growing environmental pollutant, has been widely described. Their distribution in both the terrestrial and marine realms suggests that they are a key geological indicator of the Anthropocene, as a distinctive stratal component. Most immediately evide...
Article
This review provides a discussion of the published literature concerning benthic plastic debris in ocean, sea, lake, estuary and river bottoms throughout the world. Although numerous investigations of shoreline, surface and near-surface plastic debris provide important information on plastics types, distribution, accumulation, and degradation, stud...
Article
The distribution patterns, compositions and textures of plastic debris along the Lake Erie and St. Clair shorelines were studied in order to determine the roles of potential source locations, surface currents, and shoreline types in the accumulation of plastic litter. The results were compared with those previously determined from Lake Huron, where...
Article
Full-text available
Recognition of increasing plastic debris pollution over the last several decades has led to investigations of the imminent dangers posed to marine organisms and their ecosystems, but very little is known about the preservation potential of plastics in the rock record. As anthropogenically derived materials, plastics are astonishingly abundant in oc...
Article
Four Paleoproterozoic formations of the Waterberg Group in South Africa are composed of coarse clastic detritus derived from erosion of the Limpopo Belt. Timing of the Limpopo orogeny, an event involving the collision of the Kaapvaal and Zimbabwe cratons, has long been a contentious issue. The results of point counting, major and trace element geoc...
Article
Neoproterozoic volcanic and sedimentary rocks compose the 750m thick Koivib Mountains succession, which forms part of the Rosh Pinah Formation of southwest Namibia. Detailed sedimentary facies analysis and physical volcanology enabled determination of four lithofacies and component twelve facies that record subaqueous deposition in a tectonically c...
Article
The Slave Craton is composed of five Archaean terranes that accreted during the Neoarchean. The Central Slave superterrane is the only tectonic block containing evidence of four major sedimentary successions, including 1) a quartz arenite-dominated succession deposited on an extensive tide-influenced coastline along a rifted continental margin, 2)...
Article
ZnO nanostructures of various morphologies and crystallinities were fabricated by thermal evaporation from Zn powder in a tube furnace in the presence of oxygen. It was found that the morphology of ZnO nanostructures was affected by synthesis parameters, such as growth temperature, carrier gas flow, and the presence of catalyst on the surface of th...
Article
Full-text available
The ephemeral nature of most sedimentation processes and the fragmentary character of the sedimentary record are of first-order importance. Despite a basic uniformity of external controls on sedimentation resulting in markedly similar lithologies, facies, facies associations and depositional elements within the rock record across time, there are a...
Article
Resistivity of plastic litter to chemical weathering, mechanical erosion, and biological degradation poses a critical environmental threat. Plastic debris has increased in abundance over the past several decades along shorelines and at sea, where organisms mistake small particles including plastic pellets as a potential food supply. These pellets h...
Article
Plastic debris in the Earth's oceans and larger freshwater (FW) bodies presents a serious environmental threat to aquatic organisms. Degradation of plastic by mechanical erosion and chemical weathering is minimal in water. Once deposited on beaches, plastic fragments are exposed to UV radiation and physical processes controlled by winds, currents a...
Article
Full-text available
Chemical and mechanical weathering textures on siliciclastic grains have provided important information concerning depositional processes and environments, yet understanding is limited by the multicycle origin of most sedimentary deposits. Sea glass grains sampled from a beach in Port Allen, Kauai, Hawaii, were analyzed for mechanical and chemical...
Article
Plastic debris is accumulating on the beaches of Kauai at an alarming rate, averaging 484 pieces/day in one locality. Particles sampled were analyzed to determine the effects of mechanical and chemical processes on the breakdown of polymers in a subtropical setting. Scanning electron microscopy (SEM) indicates that plastic surfaces contain fracture...
Article
Purported 3,465-million-year-old microfossils from Australia have been the subject of considerable debate. A method to distinguish between pristine fossils, mineral artefacts and subsequent microbial contamination will aid the search for ancient biogenic material.
Article
The football-sized 8.2 kg Lovina ataxite is a newly classified iron meteorite that was found in Bali, Indonesia in 1981. Its unusual appearance and strong weathering have, over the years, precluded its being identified as a meteorite. Remarkable features include cm-sized pyramidal projections, or ziggurats, with mm-spaced ribs on its top surface (o...
Article
The resistivity of plastic debris to chemical and mechanical weathering processes poses a serious threat to the environment. Numerous marine beaches are littered with plastic fragments that entangle and become ingested by organisms including birds, turtles and plankton. Although many studies have been conducted to determine the amount and effects o...
Chapter
The Archaean Keskarrah, Beaulieu Rapids and Jackson Lake formations are late-orogenic, tectonically controlled sedimentary sequences characterized by major bounding unconformities and crustal-scale faults. Representing the youngest depostional event in the Slave Province, the successions contain similar lithofacies, rapid lateral and vertical litho...
Article
The 300 × 700 km Abitibi greenstone belt in Canada contains numerous world class Archean volcanogenic massive sulfide (VMS) deposits, yet documentation of Archean subaqueous calderas hosting such deposits is lacking. The modern Sunrise deposit in the Myojin Knoll caldera of the Izu–Bonin arc shows that submarine calderas are first order sites for V...
Article
The 50–300 m thick 2.6 Ga Jackson Lake Formation in the Slave Province is a coarse clastic N-trending sedimentary sequence that formed during the terminal stage of Archaean cratonization. The western basin margin displays an unconformable contact with older volcanic rocks and the eastern margin is fault-bounded. The conglomerate–sandstone, sandston...
Chapter
Ancient and modern subaqueous calderas form in deep- to shallow-marine oceanic settings and are primary sites for volcanogenic massive sulphide (VMS) deposits. Caldera structures hosting VMS deposits are concentrated in the Archean Abitibi greenstone belt and in the Wabigoon subprovince. The Hunter Mine and Normetal calderas, two little-known effus...
Article
Kakanui volcaniclastic deposits on the South Island of New Zealand are the remnants of two late Eocene to early Oligocene Surtseyan-type cones. Eruptive-dominated material of the (i) stratified tuff and lapilli tuff, and (ii) lapilli tuff breccia lithofacies and post-eruptive debris of the (iii) shell-rich tuff and lapilli tuff, and (iv) chaotic an...
Article
The Middle to basal Upper Ordovician Lindsay Formation unconformably overlies the Paleoproterozoic Bar River and Lorrain formations on Manitoulin Island (Ontario, Canada), representing a depositional hiatus of at least 1.7 billion years. The Paleoproterozoic inliers currently exposed as basement highs in the Sheguiandah region comprised a 14 km2 ar...
Article
Lovina is a heavily-weathered ataxite with ziggurat-like projections and deep vugs. Micro-XRD, petrography, SEM and INAA confirmed it to be an ungrouped ataxite. Weathered ziggurats contained taenite, awaruite and magnetite.
Article
Late Archean diachronous unconformities underlying tectonically controlled coarse clastic successions are located throughout the Superior Province of Canada. Examples studied in detail include hiatuses at the base of the Timmins and Kirkland basins in the Abitibi greenstone belt and the Crowduck and Stormy basins in the Wabigoon Subprovince. The Ti...
Article
Sedimentation in molasse basins is controlled by tectonics, however, recycling and chemical weathering play a critical role in the compositional evolution of a sedimentary succession. The Cretaceous to Pliocene molasse deposits of Central Otago, New Zealand are excellent examples of tectonically related deposits that were governed by the effects of...
Article
The 20- to 1000-m- thick >2.8 Ga Bell Lake group is a siliciclastic-dominated succession in the Slave craton that contains features consistent with continental rifting. The Archean succession is composed of four principal lithofacies: (1) conglomerate, (2) quartz arenite, (3) sandstone-argillite, and (4) argillite-sandstone. An unconformity with 2....
Article
This chapter reviews three distinct areas in the Slave craton and assesses their potential of containing ophiolite sequences. The inferred base of the Point Lake volcanic belt is composed of mafic mylonite with low-strain domains of gabbro, pyroxenite, dunite, and peridotite. The mafic mylonite is overlain by gabbro, layered gabbro, minor mafic dik...
Article
The 200-m thick, volcano-sedimentary Raquette Lake Formation, located in the south-central Archean Slave Province, represents a remnant arc segment floored by continental crust. The formation overlies the gneissic Sleepy Dragon Complex unconformably, is laterally interstratified with subaqueous mafic basalts of the Cameron River volcanic belt, and...
Article
The 2.67-2.69-Ga Peltier Formation of the Point Lake volcanic belt, central Slave Province, Canada, is a mafic-dominated succession that erupted in a back-arc basin overlying sialic crust. The formation overlies the 3.22-Ga Augustus Granite, is interstratified with the > 2.65-Ga turbiditic Contwoyto Formation, and is associated with 2.68-Ga felsic...
Article
Archean volcanic rocks in the mafic-dominated, ca. 2.66–2.69 Ga Point Lake and Beaulieu River belts, Slave Province, Northwest Territories, are significant in demonstrating the facies that characterize specific portions of pillow volcanoes or seamounts, irrespective of tectonic setting. Three distinct localities mapped in detail display facies cons...
Article
The 0.2–1km thick Archean Beaulieu Rapids Formation is a late-orogenic, tectonically-controlled sedimentary sequence overlying the Beaulieu River volcanic belt unconformably on the west and bordering the major, N-trending Beniah Lake fault on the east. Local porphyry stocks, characteristic of late-orogenic successions, were emplaced along strike of...
Article
The late-orogenic Archaean Duparquet, Kirkland and Stormy basins of the Canadian Superior Province are characterized by bounding crustal-scale faults and abundant porphyry stock emplacement. Lava flows and pyroclastic deposits are restricted to the Kirkland and Stormy basins, and coarse clastic detritus characterizes the Duparquet basin. Seven dist...
Article
The 2.6 Ga Keskarrah Formation, located in the central Slave Province, Northwest Territories, Canada, is a late-orogenic, tectonically controlled sedimentary sequence that developed under unusual climatic and depositional conditions. The formation is adjacent to the crustal-scale, north-trending Beniah Lake Fault and overlies the 3.15 Ga Augustus G...

Network

Cited By

Projects

Projects (7)
Project
Over his long and productive career, Grant Young made many significant contributions to the understanding of Precambrian stratigraphy, sedimentology, glacial processes, geochemistry, basin tectonics, and global correlations, based on detailed fieldwork and laboratory studies. We invite insightful contributions to the understanding of the Precambrian in all of these areas, with a preferred focus on glaciations and climate proxies in relation to tectonics in Precambrian sedimentary basins, as well as presentations on global correlations and extra-terrestrial analogues that could be applied to Precambrian sedimentary systems. This symposium will be part of the 2021 Geological Association of Canada/Mineralogical Association of Canada, Joint Annual Meeting, to be held in London Ontario Canada from May 17th-19th 2021. For details see https://gac.ca/gac-mac-london-2021/ This includes details of an associated field trip “Geology of the Huronian Supergroup north of Lake Huron, Canada - a fieldtrip in memory of Grant M. Young” led by Patricia Corcoran (Western). Co-chairs: Darrel Long, Charlie Jefferson, Rob Rainbird, Patricia Corcoran.
Project
The goal is to understand the near surface environments of the early earth and life, and the physical and chemical processes ruling erosion and sedimentation
Project
The Anthropocene concept is a multileveled approach, based on 1) anthropogenic changes in the Earth system level; 2) its imprint and manifestation in geological sediments, possibly demanding the establishment of a new geological epoch (geology level); and 3) the responsibility metalevel where, based on the outcomes of 1 and 2 societal, technical and cultural matters are discussed and negotiated what to do with the research results from 1) and 2) and which pathways exist into a "functioning" future Earth system which supports humans and nature on a long-scale. Although all three levels are interconnected, discussion and criticism on the Anthropocene concept should explicitly address the relevant level(s).