David A Grimley

Biographic Data

ID	2738440
NAME	David A Grimley
GIVEN NAMES	David A
FAMILY NAME	Grimley
SIGNATURE	GRIMLEY D A
AFFILIATIONS	United States Geological Survey
ORCID	0000-0001-9179-8414
VERIFIED	Yes
TOTAL WORKS	15
TOTAL CITATIONS	9
WORKS AS AUTHOR	15
WORKS AS EDITOR	0
FIRST PUBLICATION YEAR	1998
LATEST PUBLICATION YEAR	2026
H-INDEX	2

Last glacial maximum and late glacial aeolian sand activity, south-central Indiana, USA
Open AccessHenry M Loope, José Luis Antinao et al.ARTICLEQuaternary Research2026
The chronology of Late Pleistocene and Holocene aeolian sand activity in midcontinent North America provides important insight into paleoenvironmental change and associated surface processes. Near the limit of Marine Isotope Stage 2 glaciation of the Huron-Erie Lobe (Laurentide Ice Sheet) in south-central Indiana, aeolian sand deposits found along the eastern margin of outwash plains in the East Fork and West Fork White River valleys provide an o…
Near-surface winds at the southern Laurentide ice margin through the last deglaciation
Open AccessJessica L Conroy, Christina Karamperidou et al.ARTICLEQuaternary Research2025
Terrestrial proxies of wind direction spanning the last deglaciation suggest easterly winds were present near the Laurentide Ice Sheet margin in the North American midcontinent. However, the existence and spatial extent of such easterly winds have not been investigated with transient paleoclimate model simulations, which could provide improved dynamical context for interpreting the causes of these winds. Here we assess near-surface winds near the…
Updated chronology for Peoria Silt (loess) accumulation in Illinois and western Indiana from radiocarbon dating of terrestrial gastropod shells
Open AccessDavid A Grimley, Henry M Loope et al.ARTICLEQuaternary Research2024
Based on calibrated radiocarbon ages of terrestrial gastropod shells (Succineidae, Discus , Stenotrema , Webbhelix ), the chronology of Peoria Silt (loess) deposition in the Central Lowlands is updated. These taxa provide reliable ages (within ~0.2 ka), based on historical shell dating, shell-organic age comparisons, and stratigraphic consistency. A compilation of 53 new and 36 published Peoria Silt shell ages (calibrated), from 12 localities, da…
Sensitivity of a meandering lowland river to intensive landscape management
Open AccessBruce L Rhoads, Alison M Anders et al.ARTICLEAnthropocene2024Cited by: 1References: 83
Episodic deposition of Illinois Valley Peoria silt in association with Lake Michigan Lobe fluctuations during the last glacial maximum
Open AccessT Andrew Nash, Jessica L Conroy et al.ARTICLEQuaternary Research2018
The chronology and cause of millennial depositional oscillations within last glacial loess of the Central Lowlands of the United States are uncertain. Here, we present a new age model that indicates the Peoria Silt along the Illinois River Valley accumulated episodically from ~28,500 to 16,000 cal yr BP, as the Lake Michigan Lobe margin fluctuated within northeastern Illinois. The age model indicates accelerated loess deposition coincident with r…
Approaches and challenges to the study of loess—Introduction to the LoessFest Special Issue
Open AccessRandall J Schaetzl, E Arthur Bettis et al.ARTICLEQuaternary Research2018
In September 2016, the annual meeting of the International Union for Quaternary Research’s Loess and Pedostratigraphy Focus Group, traditionally referred to as a LoessFest, met in Eau Claire, Wisconsin, USA. The 2016 LoessFest focused on “thin” loess deposits and loess transportation surfaces. This LoessFest included 75 registered participants from 10 countries. Almost half of the participants were from outside the United States, and 18 of the pa…
Using magnetic fly ash to identify post-settlement alluvium and its record of atmospheric pollution, central USA
Open AccessDavid A Grimley, Alison M Anders et al.ARTICLEAnthropocene2017Cited by: 4References: 59
Deglacial Hydroclimate of Midcontinental North America
Open AccessSteven L Voelker, Michael C Stambaugh et al.ARTICLEQuaternary Research2015
During the last deglaciation temperatures over midcontinental North America warmed dramatically through the Bølling-Allerød, underwent a cool period associated with the Younger-Dryas and then reverted to warmer, near modern temperatures during the early Holocene. However, paleo proxy records of the hydroclimate of this period have presented divergent evidence. We reconstruct summer relative humidity (RH) across the last deglacial period using a m…
Origin of glacial ridges (OIS 6) in the Kaskaskia Sublobe, southwestern Illinois, USA
Open AccessNathan D Webb, David A Grimley et al.ARTICLEQuaternary Research2012
The origin of Illinois Episode (OIS 6) glacial ridges (formerly: ‘Ridged Drift’) in the Kaskaskia Basin of southwestern Illinois is controversial despite a century of research. Two studied ridges, containing mostly fluvial sand (OSL ages: ~ 150 ± 19 ka), with associated debris flows and high-angle reverse faults, are interpreted as ice-walled channels. A third studied ridge, containing mostly fine-grained till, is arcuate and morainal. The spatia…
Assessing Open-System Behavior of 14 C in Terrestrial Gastropod Shells
Open AccessJason A Rech, Jeffrey S Pigati et al.ARTICLERadiocarbon2011Cited by: 4References: 26
In order to assess open-system behavior of radiocarbon in fossil gastropod shells, we measured the 14 C activity on 10 aliquots of shell material recovered from Illinoian (~190–130 ka) and pre-Illinoian (~800 ka) loess and lacustrine deposits in the Midwestern USA. Eight of the 10 aliquots yielded measurable 14 C activities that ranged from 0.25 to 0.53 percent modern carbon (pMC), corresponding to apparent 14 C ages between 48.2 and 42.1 ka. Thi…
Paradigms and proboscideans in the southern Great Lakes region, USA
Open AccessJeffrey J Saunders, Eric C Grimm et al.ARTICLEQuaternary International2010
Provenance, age, and environment of mid-wisconsinan slackwater lake sediment in the St. Louis Metro East Area, USA
Open AccessB Brandon Curry, David A GrimleyARTICLEQuaternary Research2006
Valleys tributary to the Mississippi River contain fossiliferous slackwater lake sediment (Equality Formation) deposited in response to aggradation of the Mississippi River valley during the last glaciation. In the St. Louis Metro East area, the lower part of the Equality Formation is primarily laminated, fossiliferous silt and clay deposited from about 44,150 to 24,310 14 C yr B.P. The upper Equality Formation is primarily very fine sand to silt…
Mammoth (Mammuthus sp.) excavation on a college campus in Western Illinois, USA
Open AccessJanis D Treworgy, Jeffrey J Saunders et al.ARTICLEQuaternary International2006
Magnetic Susceptibility and Mineral Zonations Controlled by Provenance in Loess along the Illinois and Central Mississippi River Valleys
Open AccessDavid A Grimley, Leon R Follmer et al.ARTICLEQuaternary Research1998
Magnetic susceptibility (MS) patterns have proven useful for regional stratigraphic correlations of zones within thick, oxidized Peoria and Roxana Silts along the Illinois and Central Mississippi River valleys for more than 350 km. Variations in MS of C horizon loess are controlled by silt-sized magnetite content and are interpreted to reflect changes in sediment provenance due to fluctuations of the Superior and Lake Michigan glacier lobes and t…
Pedogenic influences on magnetic susceptibility patterns in loess-paleosol sequences of southwestern Illinois
Open AccessDavid A GrimleyARTICLEQuaternary International1998

Magnetic Susceptibility and Mineral Zonations Controlled by Provenance in Loess along the Illinois and Central Mississippi River Valleys
Open AccessDavid A Grimley, Leon R Follmer et al.ARTICLEQuaternary Research1998
Magnetic susceptibility (MS) patterns have proven useful for regional stratigraphic correlations of zones within thick, oxidized Peoria and Roxana Silts along the Illinois and Central Mississippi River valleys for more than 350 km. Variations in MS of C horizon loess are controlled by silt-sized magnetite content and are interpreted to reflect changes in sediment provenance due to fluctuations of the Superior and Lake Michigan glacier lobes and t…
Pedogenic influences on magnetic susceptibility patterns in loess-paleosol sequences of southwestern Illinois
Open AccessDavid A GrimleyARTICLEQuaternary International1998
Provenance, age, and environment of mid-wisconsinan slackwater lake sediment in the St. Louis Metro East Area, USA
Open AccessB Brandon Curry, David A GrimleyARTICLEQuaternary Research2006
Valleys tributary to the Mississippi River contain fossiliferous slackwater lake sediment (Equality Formation) deposited in response to aggradation of the Mississippi River valley during the last glaciation. In the St. Louis Metro East area, the lower part of the Equality Formation is primarily laminated, fossiliferous silt and clay deposited from about 44,150 to 24,310 14 C yr B.P. The upper Equality Formation is primarily very fine sand to silt…
Mammoth (Mammuthus sp.) excavation on a college campus in Western Illinois, USA
Open AccessJanis D Treworgy, Jeffrey J Saunders et al.ARTICLEQuaternary International2006
Paradigms and proboscideans in the southern Great Lakes region, USA
Open AccessJeffrey J Saunders, Eric C Grimm et al.ARTICLEQuaternary International2010
Assessing Open-System Behavior of 14 C in Terrestrial Gastropod Shells
Open AccessJason A Rech, Jeffrey S Pigati et al.ARTICLERadiocarbon2011Cited by: 4References: 26
In order to assess open-system behavior of radiocarbon in fossil gastropod shells, we measured the 14 C activity on 10 aliquots of shell material recovered from Illinoian (~190–130 ka) and pre-Illinoian (~800 ka) loess and lacustrine deposits in the Midwestern USA. Eight of the 10 aliquots yielded measurable 14 C activities that ranged from 0.25 to 0.53 percent modern carbon (pMC), corresponding to apparent 14 C ages between 48.2 and 42.1 ka. Thi…
Origin of glacial ridges (OIS 6) in the Kaskaskia Sublobe, southwestern Illinois, USA
Open AccessNathan D Webb, David A Grimley et al.ARTICLEQuaternary Research2012
The origin of Illinois Episode (OIS 6) glacial ridges (formerly: ‘Ridged Drift’) in the Kaskaskia Basin of southwestern Illinois is controversial despite a century of research. Two studied ridges, containing mostly fluvial sand (OSL ages: ~ 150 ± 19 ka), with associated debris flows and high-angle reverse faults, are interpreted as ice-walled channels. A third studied ridge, containing mostly fine-grained till, is arcuate and morainal. The spatia…
Deglacial Hydroclimate of Midcontinental North America
Open AccessSteven L Voelker, Michael C Stambaugh et al.ARTICLEQuaternary Research2015
During the last deglaciation temperatures over midcontinental North America warmed dramatically through the Bølling-Allerød, underwent a cool period associated with the Younger-Dryas and then reverted to warmer, near modern temperatures during the early Holocene. However, paleo proxy records of the hydroclimate of this period have presented divergent evidence. We reconstruct summer relative humidity (RH) across the last deglacial period using a m…
Using magnetic fly ash to identify post-settlement alluvium and its record of atmospheric pollution, central USA
Open AccessDavid A Grimley, Alison M Anders et al.ARTICLEAnthropocene2017Cited by: 4References: 59
Episodic deposition of Illinois Valley Peoria silt in association with Lake Michigan Lobe fluctuations during the last glacial maximum
Open AccessT Andrew Nash, Jessica L Conroy et al.ARTICLEQuaternary Research2018
The chronology and cause of millennial depositional oscillations within last glacial loess of the Central Lowlands of the United States are uncertain. Here, we present a new age model that indicates the Peoria Silt along the Illinois River Valley accumulated episodically from ~28,500 to 16,000 cal yr BP, as the Lake Michigan Lobe margin fluctuated within northeastern Illinois. The age model indicates accelerated loess deposition coincident with r…
Approaches and challenges to the study of loess—Introduction to the LoessFest Special Issue
Open AccessRandall J Schaetzl, E Arthur Bettis et al.ARTICLEQuaternary Research2018
In September 2016, the annual meeting of the International Union for Quaternary Research’s Loess and Pedostratigraphy Focus Group, traditionally referred to as a LoessFest, met in Eau Claire, Wisconsin, USA. The 2016 LoessFest focused on “thin” loess deposits and loess transportation surfaces. This LoessFest included 75 registered participants from 10 countries. Almost half of the participants were from outside the United States, and 18 of the pa…
Updated chronology for Peoria Silt (loess) accumulation in Illinois and western Indiana from radiocarbon dating of terrestrial gastropod shells
Open AccessDavid A Grimley, Henry M Loope et al.ARTICLEQuaternary Research2024
Based on calibrated radiocarbon ages of terrestrial gastropod shells (Succineidae, Discus , Stenotrema , Webbhelix ), the chronology of Peoria Silt (loess) deposition in the Central Lowlands is updated. These taxa provide reliable ages (within ~0.2 ka), based on historical shell dating, shell-organic age comparisons, and stratigraphic consistency. A compilation of 53 new and 36 published Peoria Silt shell ages (calibrated), from 12 localities, da…
Sensitivity of a meandering lowland river to intensive landscape management
Open AccessBruce L Rhoads, Alison M Anders et al.ARTICLEAnthropocene2024Cited by: 1References: 83
Near-surface winds at the southern Laurentide ice margin through the last deglaciation
Open AccessJessica L Conroy, Christina Karamperidou et al.ARTICLEQuaternary Research2025
Terrestrial proxies of wind direction spanning the last deglaciation suggest easterly winds were present near the Laurentide Ice Sheet margin in the North American midcontinent. However, the existence and spatial extent of such easterly winds have not been investigated with transient paleoclimate model simulations, which could provide improved dynamical context for interpreting the causes of these winds. Here we assess near-surface winds near the…
Last glacial maximum and late glacial aeolian sand activity, south-central Indiana, USA
Open AccessHenry M Loope, José Luis Antinao et al.ARTICLEQuaternary Research2026
The chronology of Late Pleistocene and Holocene aeolian sand activity in midcontinent North America provides important insight into paleoenvironmental change and associated surface processes. Near the limit of Marine Isotope Stage 2 glaciation of the Huron-Erie Lobe (Laurentide Ice Sheet) in south-central Indiana, aeolian sand deposits found along the eastern margin of outwash plains in the East Fork and West Fork White River valleys provide an o…