John H Mcandrews
Dados Biográficos
| ID | 1542548 |
|---|---|
| NOME | John H Mcandrews |
| PRENOMES | John H |
| SOBRENOME | Mcandrews |
| ASSINATURA | MCANDREWS J H |
| AFILIAÇÕES | University of Toronto |
| VERIFICADO | Não |
| TOTAL DE OBRAS | 10 |
| TOTAL DE CITAÇÕES | 35 |
| TOTAL COMO AUTOR | 10 |
| TOTAL COMO EDITOR | 0 |
| PRIMEIRO ANO DE PUBLICAÇÃO | 1984 |
| ANO MAIS RECENTE DE PUBLICAÇÃO | 2023 |
| ÍNDICE H | 3 |
The varved succession of Crawford Lake, Milton, Ontario, Canada as a candidate Global boundary Stratotype Section and Point for the Anthropocene series
An annually laminated succession in Crawford Lake, Ontario, Canada is proposed for the Global boundary Stratotype Section and Point (GSSP) to define the Anthropocene as a series/epoch with a base dated at 1950 CE. Varve couplets of organic matter capped by calcite precipitated each summer in alkaline surface waters reflect environmental change at global to local scales. Spheroidal carbonaceous particles and nitrogen isotopes record an increase in…
Geological History and Paleoenvironment
Fungal spores record Iroquoian and Canadian agriculture in 2nd millennium a.d. sediment of Crawford Lake, Ontario, Canada
The Fernbank interglacial site near Ithaca, New York, USA
The Fernbank interglacial site, on the west side of Cayuga Lake, New York, has been recently subjected to more detailed study. To a lengthened mollusc list are added ostracodes, insects, fish, pollen, and plant macrofossils. Of these, plants are well preserved and diverse, whereas other groups are poorly preserved and incomplete. Nevertheless, all support the interglacial assignment (Sangamon), which is further supported by minimum age radiocarbo…
Identifying fossil wild rice (Zizania) pollen from Cootes Paradise, Ontario
Glacial lake levels and Eastern Great Lakes Palaeo-Indians
This article investigates changing lake levels in the late Pleistocene eastern Great Lakes in order to gain insights into the Early Palaeo-Indian occupations. Significant new information bearing on lake level history is provided, notably the first well-documented deposits of a high water level above modern in the ca. 11,000–10,300 B.P. period in the southern Lake Huron basin. The lake level information, along with paleoenvironmental and site data…
Charcoal evidence for Indian-set fires
Clark and Royall (1995) present a charcoal influx curve for Crawford Lake in southern Ontario and conclude that the Indians were responsible for a succession from beech to oak and pine throughout southern Ontario. We present an alternative hypothesis, that the 'Little Ice Age' caused the forest succession and that domestic fires and burning of stubble in agricultural fields were responsible for the charcoal record
Holocene water levels at Rice Lake, Ontario, Canada
Four cores taken along a transect from the western basin and four cores from the middle basin of Rice Lake, Ontario, provide evidence for shoreline transgression during the early Holocene, for low water levels during the mid-Holocene, and for abrupt rise of the lake levels due to dam building in AD 1838. The transition from detritus mud to the overlying marl, spanning from ca. 10000 to 8600 BP, indicates flooding of a wetland by a lake; this floo…
Paleoenvironment and the archaeological record at the L'Anse Aux Meadows Site, Newfoundland
Archaeological evidence from the marine terrace and fen at the site indicates brief episodic occupation for over 5000 years. Five cultural episodes have been identified, although the site is renowned for its Norse settlement. A fen on the site has provided both artifacts and fossil pollen. Although the pollen spectra are dominated by disturbance taxa, they indicate little or no human impact. Both the archaeological data and the pollen spectra are…
Pollen Analysis of the 1973 Ice Core from Devon Island Glacier, Canada
Meltwater from a 299-m-long ice core was filtered and analyzed for fossil pollen and spores. Pollen concentration was higher in the late Holocene and interglacial intervals (ca. 7 liter −1 ) than in the early Holocene and Wisconsinan (ca. 1–2 liter −1 ) ones. The late Holocene and interglacial assemblages were dominated by Alnus (alder), whereas the early Holocene and Wisconsinan ones were dominated by Betula (birch) and Artemisia (sage). During …
The varved succession of Crawford Lake, Milton, Ontario, Canada as a candidate Global boundary Stratotype Section and Point for the Anthropocene series
An annually laminated succession in Crawford Lake, Ontario, Canada is proposed for the Global boundary Stratotype Section and Point (GSSP) to define the Anthropocene as a series/epoch with a base dated at 1950 CE. Varve couplets of organic matter capped by calcite precipitated each summer in alkaline surface waters reflect environmental change at global to local scales. Spheroidal carbonaceous particles and nitrogen isotopes record an increase in…
Fungal spores record Iroquoian and Canadian agriculture in 2nd millennium a.d. sediment of Crawford Lake, Ontario, Canada
Holocene water levels at Rice Lake, Ontario, Canada
Four cores taken along a transect from the western basin and four cores from the middle basin of Rice Lake, Ontario, provide evidence for shoreline transgression during the early Holocene, for low water levels during the mid-Holocene, and for abrupt rise of the lake levels due to dam building in AD 1838. The transition from detritus mud to the overlying marl, spanning from ca. 10000 to 8600 BP, indicates flooding of a wetland by a lake; this floo…
Paleoenvironment and the archaeological record at the L'Anse Aux Meadows Site, Newfoundland
Archaeological evidence from the marine terrace and fen at the site indicates brief episodic occupation for over 5000 years. Five cultural episodes have been identified, although the site is renowned for its Norse settlement. A fen on the site has provided both artifacts and fossil pollen. Although the pollen spectra are dominated by disturbance taxa, they indicate little or no human impact. Both the archaeological data and the pollen spectra are…
Identifying fossil wild rice (Zizania) pollen from Cootes Paradise, Ontario
Charcoal evidence for Indian-set fires
Clark and Royall (1995) present a charcoal influx curve for Crawford Lake in southern Ontario and conclude that the Indians were responsible for a succession from beech to oak and pine throughout southern Ontario. We present an alternative hypothesis, that the 'Little Ice Age' caused the forest succession and that domestic fires and burning of stubble in agricultural fields were responsible for the charcoal record
Pollen Analysis of the 1973 Ice Core from Devon Island Glacier, Canada
Meltwater from a 299-m-long ice core was filtered and analyzed for fossil pollen and spores. Pollen concentration was higher in the late Holocene and interglacial intervals (ca. 7 liter −1 ) than in the early Holocene and Wisconsinan (ca. 1–2 liter −1 ) ones. The late Holocene and interglacial assemblages were dominated by Alnus (alder), whereas the early Holocene and Wisconsinan ones were dominated by Betula (birch) and Artemisia (sage). During …
Paleoenvironment and the archaeological record at the L'Anse Aux Meadows Site, Newfoundland
Archaeological evidence from the marine terrace and fen at the site indicates brief episodic occupation for over 5000 years. Five cultural episodes have been identified, although the site is renowned for its Norse settlement. A fen on the site has provided both artifacts and fossil pollen. Although the pollen spectra are dominated by disturbance taxa, they indicate little or no human impact. Both the archaeological data and the pollen spectra are…
Holocene water levels at Rice Lake, Ontario, Canada
Four cores taken along a transect from the western basin and four cores from the middle basin of Rice Lake, Ontario, provide evidence for shoreline transgression during the early Holocene, for low water levels during the mid-Holocene, and for abrupt rise of the lake levels due to dam building in AD 1838. The transition from detritus mud to the overlying marl, spanning from ca. 10000 to 8600 BP, indicates flooding of a wetland by a lake; this floo…
Charcoal evidence for Indian-set fires
Clark and Royall (1995) present a charcoal influx curve for Crawford Lake in southern Ontario and conclude that the Indians were responsible for a succession from beech to oak and pine throughout southern Ontario. We present an alternative hypothesis, that the 'Little Ice Age' caused the forest succession and that domestic fires and burning of stubble in agricultural fields were responsible for the charcoal record
Glacial lake levels and Eastern Great Lakes Palaeo-Indians
This article investigates changing lake levels in the late Pleistocene eastern Great Lakes in order to gain insights into the Early Palaeo-Indian occupations. Significant new information bearing on lake level history is provided, notably the first well-documented deposits of a high water level above modern in the ca. 11,000–10,300 B.P. period in the southern Lake Huron basin. The lake level information, along with paleoenvironmental and site data…
Identifying fossil wild rice (Zizania) pollen from Cootes Paradise, Ontario
The Fernbank interglacial site near Ithaca, New York, USA
The Fernbank interglacial site, on the west side of Cayuga Lake, New York, has been recently subjected to more detailed study. To a lengthened mollusc list are added ostracodes, insects, fish, pollen, and plant macrofossils. Of these, plants are well preserved and diverse, whereas other groups are poorly preserved and incomplete. Nevertheless, all support the interglacial assignment (Sangamon), which is further supported by minimum age radiocarbo…
Fungal spores record Iroquoian and Canadian agriculture in 2nd millennium a.d. sediment of Crawford Lake, Ontario, Canada
Geological History and Paleoenvironment
The varved succession of Crawford Lake, Milton, Ontario, Canada as a candidate Global boundary Stratotype Section and Point for the Anthropocene series
An annually laminated succession in Crawford Lake, Ontario, Canada is proposed for the Global boundary Stratotype Section and Point (GSSP) to define the Anthropocene as a series/epoch with a base dated at 1950 CE. Varve couplets of organic matter capped by calcite precipitated each summer in alkaline surface waters reflect environmental change at global to local scales. Spheroidal carbonaceous particles and nitrogen isotopes record an increase in…
Geography (9 obras) · Geology and Paleoclimatology Research (9 obras) · Archaeology (5 obras) · Archaeology and ancient environmental studies (5 obras) · Physical geography (5 obras) · Pollen (5 obras) · Geology (4 obras) · Paleontology (4 obras) · Biology (3 obras) · Ecology (3 obras)