Paul Hearty

Paul Hearty
University of Texas at Austin | UT · Department of Geological Sciences, Jackson School of Geosciences

PhD Geological Sciences and INSTAAR University of Colorado Boulder

About

180
Publications
50,491
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
6,618
Citations
Introduction
Educator, researcher, and consultant in a spectrum of natural sciences including sea-level and global changes in coastal and island environments Specialties:Stratigraphy, sedimentology, shoreline dynamics, geochronology, and paleontology
Additional affiliations
August 2018 - March 2020
University of Texas at Austin
Position
  • Professor (Associate)
July 2008 - December 2016
University of North Carolina at Wilmington
Position
  • Professor (Associate)
January 2005 - December 2008
University of Wollongong
Education
September 1981 - June 1987
INSTAAR, University of Colorado - Boulder
Field of study
  • Quaternary geology

Publications

Publications (180)
Article
Full-text available
In this paper, we formally define a series of bioclastic eolianites and protosols exposed on high-energy bank margins throughout the Bahamas archipelago as the Whale Point Formation (WPF). The position of this new lithostratigraphic unit above and seaward of deposits dated to Marine Isotope Stage (MIS) 5e and below Holocene sediments constrains its...
Article
Full-text available
The surface and subsurface geology of the Exuma Cays in the central Bahama Islands re- cords sea-level cyclicity that extends back to the Jurasssic, however the focus of this paper is the Plio-Pleis- tocene, since approximately 1–3 million years ago. During the 1990s, the rst author surveyed a large num- ber of the islands by boat, mapped the geolo...
Conference Paper
Full-text available
O'Leary, M. ;Mitrovica, J. ;Deconto, R. ;Inglis, J. D. ;Robinson, M. M. Abstract It is widely accepted that greenhouse gas-induced warming over the next few decades to centuries could lead to a rise in sea level due to melting ice caps. Yet despite the enormous social and economic consequences for society, our ability to predict the likelihood and...
Article
Full-text available
Reconstructions of global mean sea level from earlier warm periods in Earth's history can help constrain future projections of sea level rise. Here we report on the sedimentology and age of a geological unit in central Patagonia, Argentina, that we dated to the Early Pliocene (4.69-5.23 Ma, 2σ) with strontium isotope stratigraphy. The unit was inte...
Article
Full-text available
We address concerns raised by Wanless and Dravis (2020) on our paper documenting the late Quaternary evolution of West Caicos island. We negate the claim that omitting their paper (Dravis and Wanless, 2017) had any consequences for our interpretations. We also provide reasoning and data to demonstrate that our interpretation of the Quaternary strat...
Article
Full-text available
We address concerns raised by Wanless and Dravis (2020) on our paper documenting the late Quaternary evolution of West Caicos island. We negate the claim that omitting their paper (Dravis and Wanless, 2017) had any consequences for our interpretations. We also provide reasoning and data to demonstrate that our interpretation of the Quaternary strat...
Preprint
We report a geological unit surveyed and dated in central Patagonia, Argentina (Camarones town, San Jorge Gulf). The unit was interpreted as representative of an intertidal environment and dated to the Early Pliocene (4.69-5.23 Ma) with strontium isotope stratigraphy. The elevation of this unit was measured with differential GPS at ca. 36 m above p...
Article
Full-text available
The Mid‐Pliocene Warm Period (MPWP, 2.9 to 3.3 Ma), along with older Pliocene (3.2 to 5.3 Ma) records, offers potential past analogues for our 400‐ppmv world. The coastal geology of western and southern coasts of the Republic of South Africa exposes an abundance of marine deposits of Pliocene and Pleistocene age. In this study, we report differenti...
Article
We address concerns raised by Wanless and Dravis (2020) on our paper documenting the late Quaternary evolution of West Caicos island. We negate the claim that omitting their paper (Dravis and Wanless, 2017) had any consequences for our interpretations. We also provide reasoning and data to demonstrate that our interpretation of the Quaternary strat...
Conference Paper
Full-text available
The sedimentary systems of the Bahamas and other global sites reveal the relative fluctuations of sea level during marine isotope stage (MIS) 5e (~130 to 118 ka). The changes of sea level during MIS 5e were of paramount importance in Conrad Neumann's "warehouse of ideas." Reefs, constructional terraces and bioerosional notches were the early focus...
Conference Paper
Full-text available
each fenestrae (“beach bubbles” or “keystone fenestrae”) are small voids that form as sheets of water wash over dry sand, trapping air between the percolating water above and interstitial water below (Dunham, 1970; Shinn, 1983). In the Bahamas, rapid carbonate cementation preserves and lithifies these structures. Originally thought to be exclusive...
Article
The data set of the island of West Caicos consists of a combination of high-resolution lidar and digital imagery, radiometric data, and amino acid racemization (AAR) D/L values as well as extraordinary preservation of sedimentary and bio-constructed deposits on the island. Together with a well-established regional stratigraphic framework from the n...
Data
Cover montage of Bermuda and land snails along with supplementary data associated with Hearty and Olson 2019 paper available here: https://pubs.geoscienceworld.org/palaios or by request to the principle author
Article
Full-text available
Please contact primary author at kaisdad04@gmail.com for a complimentary copy of the published paper and supplements. Abstract: Considerable refinement of the surficial geology and biostratigraphy Bermuda has resulted in the proper ordering of the phylogenetic sequence of Poecilozonites, and thus offers an opportunity to examine evolutionary pathw...
Article
Full-text available
Hearty and Tormey Discussion of: Mylroie’s (2018) objective was ‘‘. . .to examine the arguments concerning the Cow and Bull [megaboulders on Eleuthera] and the fenestral porosity of the Bahama Archipelago’’ (The Bahamas and Turks and Caicos Islands, collectively termed ‘‘BTC’’). Mylroie (2018) sought to debunk several categories of evidence that su...
Conference Paper
Full-text available
A trilogy of sedimentary deposits in the Bahamas reveals a dramatic destabilization of climate and intensification of storms at the end of MIS 5e (~120-118 ka). Waves from intense storms repeatedly inundated islands across the platform from Abaco to Caicos, leaving a range of sedimentary deposits that vary according to coastal geomorphologic, topog...
Presentation
Quaternary evolution of West Caicos Island, Turks and Caicos
Data
SUPPLEMENTARY DATA AND MATERIALS from Hearty and Tormey (2017) "Superstorms" paper in Marine Geology.
Data
Supplement to Hearty and Tormey 2017 (https://doi.org/10.1016/j.margeo.2017.05.009)
Article
Geological observations from last interglacial (LIG; MIS 5e, Eemian) carbonate landscapes in the Bahamas and Bermuda reveal a turbulent climate transition at the close of the peak interglacial. The interval is associated with rapid, multi-meter shifts in sea level as major ice sheets melted and/or collapsed. Sedimentary evidence from the eastern Ba...
Article
Full-text available
The growth and decay of ocean-island volcanoes are intrinsically linked to vertical movements. While the causes for subsidence are better understood, uplift mechanisms remain enigmatic. Santa Maria Island in the Azores Archipelago is an ocean-island volcano resting on top of young lithosphere, barely 480 km away from the Mid-Atlantic Ridge. Like mo...
Article
Several analytical techniques have been used in amino acid geochronology to measure the relative abundances of D- and L-enantiomers. During the past two decades, reverse-phase (RP) liquid chromatography has become most common, whereas ion-exchange (IE) liquid chromatography was widely used prior to the mid-1990s. This study is based on intra-lab pa...
Article
Full-text available
The Last Interglacial (MIS 5e, 128-116 ka) is among the most studied past periods in Earth’s history. The climate at that time was warmer than today, primarily due to different orbital conditions, with smaller ice sheets and higher sea-level. Field evidence for MIS 5e sea-level was reported from thousands of sites, but often paleo shorelines were m...
Conference Paper
Full-text available
The rapid rise in atmospheric CO 2 exceeding 400 ppmv is driving an urgent need to better understand past sea level, ice sheet dynamics, and climate change associated with past warmer geological intervals. The LR04 record reveals sustained intervals during the Pliocene (5.6-2.6 Ma) when δ18O exceeded the present levels, indicating a possible decrea...
Conference Paper
Full-text available
Throughout the Bahamas, several lines of geologic evidence point to intensification of storms as climate destabilized at the end of the last interglacial (MIS 5e). Impacting the platform with variable effects, storm waves deposited massive boulders along the cliffs of Eleuthera, reworked lowland sediments into storm-beach ridges, and formed distinc...
Article
Full-text available
We use numerical climate simulations, paleoclimate data, and modern observations to study the effect of growing ice melt from Antarctica and Greenland. Meltwater tends to stabilize the ocean column, inducing amplifying feedbacks that increase subsurface ocean warming and ice shelf melting. Cold meltwater and induced dynamical effects cause ocean su...
Conference Paper
Full-text available
Eleuthera, on the northeastern side of the Bahamas archipelago, has a steep ocean-facing coastline fully exposed to Atlantic storms. Cliffs of Pleistocene limestone rising to about 20 m a.s.l. are topped with modern boulder deposits that include (in order of increasing clast concentration) isolated clasts, scattered-boulder fields, and boulder ridg...
Conference Paper
Full-text available
MIS 5e sea level and climatic changes
Presentation
Full-text available
Eemian MIS 5e sea level and climatic events
Research
GENERAL COMMENTS We appreciate the comments of Engel, Kindler, and Godefroid, but disagree with major components of their arguments. There is near consensus that the megaboulders on Eleuthera were transported by giant waves around the end of the late last interglacial (end-Eemian; late MIS 5e), and we welcome validation of this conclusion by our co...
Article
Full-text available
Abstract. There is evidence of ice melt, sea level rise to +5-9 meters, and extreme storms in the prior interglacial period that was less than 1°C warmer than today. Human-made climate forcing is stronger and more rapid than paleo forcings, but much can be learned by combining insights from paleoclimate, climate modeling, and on-going observations....
Article
Full-text available
For nearly a century, the Atlantic Coastal Plain (ACP) of the United States has been the focus of studies investigating Pliocene and Pleistocene shorelines, however, the mapping of paleoshorelines was primarily done by using elevation contours on topographic maps. Here we review published geologic maps and compare them to paleoshoreline locations o...
Article
Full-text available
For nearly a century, the Atlantic Coastal Plain (ACP) of the United States has been the focus of studies investigating Pliocene and Pleistocene shorelines, however, the mapping of paleoshorelines was primarily done by using elevation contours on topographic maps. Here we review published geologic maps and compare them to paleoshoreline locations o...
Article
Full-text available
The privileged location of Santa Maria Island (Azores archipelago) in the middle of the North Atlantic makes the fossiliferous outcrops on this island of utmost importance to gain a better understanding of how coeval living communities relate to the broader evolutionary and biogeographic history of the Atlantic basin during the late Neogene and the...
Data
For nearly a century, the Atlantic Coastal Plain (ACP) of the United States has been the focus of studies investigating Pliocene and Pleistocene shorelines, however, the mapping of paleoshorelines was primarily done by using elevation contours on topographic maps. Here we review published geologic maps and compare them to paleoshoreline locations o...
Article
Full-text available
We assess climate impacts of global warming using ongoing observations and paleoclimate data. We use Earth's measured energy imbalance, paleoclimate data, and simple representations of the global carbon cycle and temperature to define emission reductions needed to stabilize climate and avoid potentially disastrous impacts on today's young people, f...
Article
Full-text available
Determining eustatic sea level during the Mid-Pliocene warm period (∼3.3 to 2.9 Ma) has been a central but elusive goal in the study of past warm climates. Estimates of eustatic sea level based on geologic data span a broad range; variation that we now recognize is due in part to geographically varying post-depositional displacement caused by glaci...
Article
Full-text available
O’Leary, M.J., Hearty, P.J., Thompson, W.G., Mitrovica, J.X., Raymo, M.E., Webster, J. M., 2013. Ice sheet collapse following a prolonged period of stable sea level during the last interglacial. Nature Geoscience, 28 July 2013 | doi:10.1038/ngeo1890. During the last interglacial period, 127–116 kyr ago, global mean sea level reached a peak of 5–...
Article
Full-text available
A large, relatively intact fossil bird's egg collected on Bermuda over a century ago is identified here as that of a Brown Pelican Pelecanus occidentalis, a species known historically only as an occasional vagrant in Bermuda. Although the exact provenance and age were originally unknown, contemporary descriptions of the stratigraphy and subsequent...
Article
Full-text available
Hermit-crab transported shells of the West Indian top shell Cittarium pica occur in numerous terrestrial fossil deposits on Bermuda, which is the most remote outpost of this Caribbean species. Cittarium is so far known only from deposits of interglacial ages corresponding to marine isotope stages (MIS) 11, 9, 5e, and 1 (Holocene). In at least the c...
Article
Full-text available
The deep-sea environment is among the most stable on Earth, making it well suited for amino acid geochronology. Foraminifera with calcareous tests are distributed across the World Ocean and are often recovered in sufficient abundance from sediment cores to derive robust mean amino acid D/L values of multiple replicates from each stratigraphic level...
Article
Full-text available
MIS 11 stands out among Quaternary interglacials and offers a potential analogue for our present warming interglacial. Proxy deep-sea δ 18 O records indicate MIS 11 was one of the longest (423 to 362 ka) and perhaps warmest interglacials of the past 1 Ma. The highest geologic and geomorphic imprints of MIS sea level (SL) are generally above 10 m, r...
Article
Full-text available
In order to establish the ‘fingerprint’ of past sea level changes, many field measurements of paleo sea level from globally distributed locations are needed. It is because this problem requires a geographically expansive database that it becomes an ideal candidate for crowdsourcing techniques. In order to crowdsource sea level data from the Mid-Pli...
Article
Full-text available
We document massive deposition of carbonate sands along the south shore of Bermuda that were emplaced during one or two great storms during the last interglacial. As determined by their stratigraphic position and geochronological data, these deposits formed during marine isotope substage (MIS) 5c ca. 100 ka ago. Within a leeward set of eolian beds,...
Article
Full-text available
[McMurtry et al.’s (2010)][1] uplift rate of 0.06 mm/yr (= m/ka) places marine isotope stage (MIS) 7 at +16 ± 2 m, MIS 9 at +23 m, and MIS 13 and 15 at +30 m, but their age data are flawed and lack supportive field and proxy evidence. The amplitude of eustatic sea levels (ESLs) during
Article
Full-text available
In 2005, the National Geological Survey of Italy released the new sheet, 557 Cagliari (1:50.000 scale). A coastal barrier marine formation at Is Arenas (Cagliari, Sardinia, Italy), containing Strombus bubonius, was reassigned a Holocene age, in contradiction with extensive literature published over the past century indicating an MIS 5.5 age. In 200...
Article
Full-text available
During the last half million years, pulses of gigantism in the anagenetic lineage of land snails of the subgenus Poecilozonites on Bermuda were correlated with glacial periods when lower sea level resulted in an island nearly an order of magnitude larger than at present. During those periods, the island was colonized by large vertebrate predators t...
Article
It is widely accepted that greenhouse gas-induced warming over the next few decades to centuries could lead to a rise in sea level due to melting ice caps. Yet despite the enormous social and economic consequences for society, our ability to predict the likelihood and location of future melting is hampered by an insufficient theoretical and histori...
Article
Full-text available
Shells from over 280 collections representing all known forms of subgenus Poecilozonites (Zonitidae) from Bermuda have been ranked in stratigraphic order and relative-age aminostratigraphy. The samples were first grouped by their source lithostratigraphic unit, with additional refinements being made based on the epimerization ratio d-alloisoleucine...
Article
Full-text available
Despite the nearly 600 named species of the land snail Cerion, studies of the geological and paleontological framework of modern species are few. To address this deficiency, the biostratigraphic succession of Cerion was investigated at several areas on Long Island, Bahamas. A chronostratigraphic framework was developed through whole-rock and Cerion...