John P McGeehin

Biographic Data

ID	6375273
NAME	John P McGeehin
GIVEN NAMES	John P
FAMILY NAME	McGeehin
SIGNATURE	MCGEEHIN J P
AFFILIATIONS	United States Geological Survey
ORCID	0000-0002-5320-6091
VERIFIED	Yes
TOTAL WORKS	17
TOTAL CITATIONS	2
AUTHOR COUNT	17
EDITOR COUNT	0
FIRST PUBLICATION YEAR	1998
LATEST PUBLICATION YEAR	2016
H-INDEX	1

On the importance of stratigraphic control for vertebrate fossil sites in Channel Islands National Park, California, USA
Open AccessJeffrey S Pigati, Daniel R Muhs et al.ARTICLEQuaternary International2016References: 5
Late Quaternary sea-level history and the antiquity of mammoths ( Mammuthus exilis and Mammuthus columbi ), Channel Islands National Park, California, USA
Open AccessDaniel R Muhs, Kathleen R Simmons et al.ARTICLEQuaternary Research2015
Fossils of Columbian mammoths ( Mammuthus columbi ) and pygmy mammoths ( Mammuthus exilis ) have been reported from Channel Islands National Park, California. Most date to the last glacial period (Marine Isotope Stage [MIS] 2), but a tusk of M. exilis (or immature M. columbi ) was found in the lowest marine terrace of Santa Rosa Island. Uranium-series dating of corals yielded ages from 83.8 ± 0.6 ka to 78.6 ± 0.5 ka, correlating the terrace with …
Early Holocene Great Salt Lake, USA
Open AccessCharles G Oviatt, David B Madsen et al.ARTICLEQuaternary Research2015
Shorelines and surficial deposits (including buried forest-floor mats and organic-rich wetland sediments) show that Great Salt Lake did not rise higher than modern lake levels during the earliest Holocene (11.5–10.2 cal ka BP; 10–9 14 C ka BP). During that period, finely laminated, organic-rich muds (sapropel) containing brine-shrimp cysts and pellets and interbedded sodium-sulfate salts were deposited on the lake floor. Sapropel deposition was p…
Directly dated MIS 3 Lake-Level Record from Lake Manix, Mojave Desert, California, USA
Open AccessMarith C Reheis, David M Miller et al.ARTICLEQuaternary Research2015
An outcrop-based lake-level curve, constrained by ~ 70 calibrated 14 C ages on Anodonta shells, indicates at least 8 highstands between 45 and 25 cal ka BP within 10 m of the 543-m upper threshold of Lake Manix in the Mojave Desert of southern California. Correlations of Manix highstands with ice, marine, and speleothem records suggest that at least the youngest three highstands coincide with Dansgaard–Oeschger (D–O) stadials and Heinrich events …
Sedimentary evolution of Swan Lake and its implications for deglacial and Holocene paleoclimate of Southeastern Idaho
Open AccessJosé Rosario, David M Miller et al.ARTICLEQuaternary International2015
Limiting age for the Provo shoreline of Lake Bonneville
Open AccessDavid M Miller, David B Wahl et al.ARTICLEQuaternary International2015
Radiocarbon dating of late quaternary sediments using fossil gastropod shells
Open AccessJeffrey S Pigati, John P McGeehin et al.ARTICLEQuaternary International2015
Evidence of a higher late-Holocene treeline along the Continental Divide in central Colorado
Open AccessPAUL E CARRARA, John P McGeehinARTICLEThe Holocene2015Cited by: 2References: 2
Using a combination of 23 radiocarbon ages and annual ring counts from 18 Rocky Mountain bristlecone pine ( Pinus aristata) remnants above the local present-day limits, a period of higher treeline has been determined for two sites near the Continental Divide in central Colorado. The highest remnants were found about 30 m above live bristlecone pines of similar size. The majority of the remnants, consisting of standing snags, large logs, and small…
Quaternary eolian dunes in the Savannah River Valley, Jasper County, South Carolina, USA
Open AccessChristopher S Swezey, Arthur P Schultz et al.ARTICLEQuaternary Research2013
Sand hills in the Savannah River valley in Jasper County (South Carolina, USA) are interpreted as the remnants of parabolic eolian dunes composed of sand derived from the Savannah River and stabilized by vegetation under prevailing climate conditions. Optically stimulated luminescence ages reveal that most of the dunes were active ca. 40 to 19 ka ago, coincident with the last glacial maximum (LGM) through early deglaciation. Modern surface winds …
A new look at the chronology for a classic Pleistocene lake
Open AccessDavid M Miller, Charles G Oviatt et al.ARTICLEQuaternary International2013
Holocene landscape response to seasonality of storms in the Mojave Desert
Open AccessDavid M Miller, Kevin M Schmidt et al.ARTICLEQuaternary International2010
Mineral pigments at Huaca Tacaynamo (Chan Chan, Peru)
Open AccessWilliam E Brooks, Víctor Piminchumo et al.ARTICLEBulletin de l’Institut français…2008
X-ray diffraction analyses of five samples of pigments from a recently excavated mural at the archaeological site of Huaca Tacaynamo, a part of the Chan Chan archaeological complex, northern Peru, show that minerals related to metal occurrences known to have been exploited by ancient Andeans were also used as pigments. These minerals include: atacamite [Cu2Cl(OH3)] for green; azurite [Cu3(CO3)2(OH)2] for blue; calcite [CaCO3] for white; cinnabar …
Coal and Cremation at the Tschudi Burn, Chan Chan, Northern Peru
Open AccessWilliam E Brooks, César A Gálvez Mora et al.ARTICLEArchaeometry2008References: 17
Analyses of a 20–30 cm thick, completely combusted ash at the 25 × 70 m Tschudi burn at Chan Chan, northern Perú, contain 52–55 wt% SiO 2 , 180–210 ppm zirconium and are consistent with coal ash. Soil geochemistry across the burn showed elevated calcium and phosphorus content, possible evidence for reported human cremation. A calcined, 5 g, 4.5 cm skull fragment recovered from the burn was confirmed as human by protein radioimmunoassay (pRIA). X‐…
Holocene loess deposition and soil formation as competing processes, Matanuska Valley, Southern Alaska
Open AccessDaniel R Muhs, John P McGeehin et al.ARTICLEQuaternary Research2004
Although loess–paleosol sequences are among the most important records of Quaternary climate change and past dust deposition cycles, few modern examples of such sedimentation systems have been studied. Stratigraphic studies and 22 new accelerator mass spectrometry radiocarbon ages from the Matanuska Valley in southern Alaska show that loess deposition there began sometime after ∼6500 14 C yr B.P. and has continued to the present. The silts are pr…
Radiocarbon Dating, Chronologic Framework, and Changes in Accumulation Rates of Holocene Estuarine Sediments from Chesapeake Bay
Open AccessSteven M Colman, Pattie C Baucom et al.ARTICLEQuaternary Research2002
Rapidly accumulating Holocene sediments in estuaries commonly are difficult to sample and date. In Chesapeake Bay, we obtained sediment cores as much as 20 m in length and used numerous radiocarbon ages measured by accelerator mass spectrometry methods to provide the first detailed chronologies of Holocene sediment accumulation in the bay. Carbon in these sediments is a complex mixture of materials from a variety of sources. Analyses of different…
Chronology and geochemistry of late Holocene eolian deposits in the Brandon Sand Hills, Manitoba, Canada
Open AccessStephen A Wolfe, Daniel R Muhs et al.ARTICLEQuaternary International2000
Paleopedology plus TL, 10Be, and 14C dating as tools in stratigraphic and paleoclimatic investigations, Mississippi River Valley, U.S.A
Open AccessHelaine W Markewich, Douglas A Wysocki et al.ARTICLEQuaternary International1998

Paleopedology plus TL, 10Be, and 14C dating as tools in stratigraphic and paleoclimatic investigations, Mississippi River Valley, U.S.A
Open AccessHelaine W Markewich, Douglas A Wysocki et al.ARTICLEQuaternary International1998
Chronology and geochemistry of late Holocene eolian deposits in the Brandon Sand Hills, Manitoba, Canada
Open AccessStephen A Wolfe, Daniel R Muhs et al.ARTICLEQuaternary International2000
Radiocarbon Dating, Chronologic Framework, and Changes in Accumulation Rates of Holocene Estuarine Sediments from Chesapeake Bay
Open AccessSteven M Colman, Pattie C Baucom et al.ARTICLEQuaternary Research2002
Rapidly accumulating Holocene sediments in estuaries commonly are difficult to sample and date. In Chesapeake Bay, we obtained sediment cores as much as 20 m in length and used numerous radiocarbon ages measured by accelerator mass spectrometry methods to provide the first detailed chronologies of Holocene sediment accumulation in the bay. Carbon in these sediments is a complex mixture of materials from a variety of sources. Analyses of different…
Holocene loess deposition and soil formation as competing processes, Matanuska Valley, Southern Alaska
Open AccessDaniel R Muhs, John P McGeehin et al.ARTICLEQuaternary Research2004
Although loess–paleosol sequences are among the most important records of Quaternary climate change and past dust deposition cycles, few modern examples of such sedimentation systems have been studied. Stratigraphic studies and 22 new accelerator mass spectrometry radiocarbon ages from the Matanuska Valley in southern Alaska show that loess deposition there began sometime after ∼6500 14 C yr B.P. and has continued to the present. The silts are pr…
Mineral pigments at Huaca Tacaynamo (Chan Chan, Peru)
Open AccessWilliam E Brooks, Víctor Piminchumo et al.ARTICLEBulletin de l’Institut français…2008
X-ray diffraction analyses of five samples of pigments from a recently excavated mural at the archaeological site of Huaca Tacaynamo, a part of the Chan Chan archaeological complex, northern Peru, show that minerals related to metal occurrences known to have been exploited by ancient Andeans were also used as pigments. These minerals include: atacamite [Cu2Cl(OH3)] for green; azurite [Cu3(CO3)2(OH)2] for blue; calcite [CaCO3] for white; cinnabar …
Coal and Cremation at the Tschudi Burn, Chan Chan, Northern Peru
Open AccessWilliam E Brooks, César A Gálvez Mora et al.ARTICLEArchaeometry2008References: 17
Analyses of a 20–30 cm thick, completely combusted ash at the 25 × 70 m Tschudi burn at Chan Chan, northern Perú, contain 52–55 wt% SiO 2 , 180–210 ppm zirconium and are consistent with coal ash. Soil geochemistry across the burn showed elevated calcium and phosphorus content, possible evidence for reported human cremation. A calcined, 5 g, 4.5 cm skull fragment recovered from the burn was confirmed as human by protein radioimmunoassay (pRIA). X‐…
Holocene landscape response to seasonality of storms in the Mojave Desert
Open AccessDavid M Miller, Kevin M Schmidt et al.ARTICLEQuaternary International2010
Quaternary eolian dunes in the Savannah River Valley, Jasper County, South Carolina, USA
Open AccessChristopher S Swezey, Arthur P Schultz et al.ARTICLEQuaternary Research2013
Sand hills in the Savannah River valley in Jasper County (South Carolina, USA) are interpreted as the remnants of parabolic eolian dunes composed of sand derived from the Savannah River and stabilized by vegetation under prevailing climate conditions. Optically stimulated luminescence ages reveal that most of the dunes were active ca. 40 to 19 ka ago, coincident with the last glacial maximum (LGM) through early deglaciation. Modern surface winds …
A new look at the chronology for a classic Pleistocene lake
Open AccessDavid M Miller, Charles G Oviatt et al.ARTICLEQuaternary International2013
Late Quaternary sea-level history and the antiquity of mammoths ( Mammuthus exilis and Mammuthus columbi ), Channel Islands National Park, California, USA
Open AccessDaniel R Muhs, Kathleen R Simmons et al.ARTICLEQuaternary Research2015
Fossils of Columbian mammoths ( Mammuthus columbi ) and pygmy mammoths ( Mammuthus exilis ) have been reported from Channel Islands National Park, California. Most date to the last glacial period (Marine Isotope Stage [MIS] 2), but a tusk of M. exilis (or immature M. columbi ) was found in the lowest marine terrace of Santa Rosa Island. Uranium-series dating of corals yielded ages from 83.8 ± 0.6 ka to 78.6 ± 0.5 ka, correlating the terrace with …
Early Holocene Great Salt Lake, USA
Open AccessCharles G Oviatt, David B Madsen et al.ARTICLEQuaternary Research2015
Shorelines and surficial deposits (including buried forest-floor mats and organic-rich wetland sediments) show that Great Salt Lake did not rise higher than modern lake levels during the earliest Holocene (11.5–10.2 cal ka BP; 10–9 14 C ka BP). During that period, finely laminated, organic-rich muds (sapropel) containing brine-shrimp cysts and pellets and interbedded sodium-sulfate salts were deposited on the lake floor. Sapropel deposition was p…
Directly dated MIS 3 Lake-Level Record from Lake Manix, Mojave Desert, California, USA
Open AccessMarith C Reheis, David M Miller et al.ARTICLEQuaternary Research2015
An outcrop-based lake-level curve, constrained by ~ 70 calibrated 14 C ages on Anodonta shells, indicates at least 8 highstands between 45 and 25 cal ka BP within 10 m of the 543-m upper threshold of Lake Manix in the Mojave Desert of southern California. Correlations of Manix highstands with ice, marine, and speleothem records suggest that at least the youngest three highstands coincide with Dansgaard–Oeschger (D–O) stadials and Heinrich events …
Sedimentary evolution of Swan Lake and its implications for deglacial and Holocene paleoclimate of Southeastern Idaho
Open AccessJosé Rosario, David M Miller et al.ARTICLEQuaternary International2015
Limiting age for the Provo shoreline of Lake Bonneville
Open AccessDavid M Miller, David B Wahl et al.ARTICLEQuaternary International2015
Radiocarbon dating of late quaternary sediments using fossil gastropod shells
Open AccessJeffrey S Pigati, John P McGeehin et al.ARTICLEQuaternary International2015
Evidence of a higher late-Holocene treeline along the Continental Divide in central Colorado
Open AccessPAUL E CARRARA, John P McGeehinARTICLEThe Holocene2015Cited by: 2References: 2
Using a combination of 23 radiocarbon ages and annual ring counts from 18 Rocky Mountain bristlecone pine ( Pinus aristata) remnants above the local present-day limits, a period of higher treeline has been determined for two sites near the Continental Divide in central Colorado. The highest remnants were found about 30 m above live bristlecone pines of similar size. The majority of the remnants, consisting of standing snags, large logs, and small…
On the importance of stratigraphic control for vertebrate fossil sites in Channel Islands National Park, California, USA
Open AccessJeffrey S Pigati, Daniel R Muhs et al.ARTICLEQuaternary International2016References: 5