65 record(s) found with the tag "paleoenvironment" (multi-year projects are grouped):
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Pleistocene sand wedges and thermal contraction cracks on Richards Island
Principal Investigator: French, Hugh
Licensed Year(s): 1993
Summary: My research is about cracks in permafrost that have been filled in with wind-blown sand. In cliffs, these filled-in crackes appear as `veins' of sand. I will record the distribution and characteristics of these veins of sand. This information may help to determine the history behind how the cracks formed and the environmental conditions of the Mackenzie Delta up to 40,000 years ago....


Marine geological and geophysical studies in Hudson Strait and Ungava Bay during 1993
Principal Investigator: MacLean, Brian
Licensed Year(s): 1993 1990
Summary: This survey will take place from a ship travelling through the Hudson Strait and Ungava Bay region. The researchers will collect information on the history and characteristics of the seabed. Some samples of sediments on the seafloor will be taken for further analyses. Transfer of a few of the ship's crew may take place at Cape Dorset but all other activities will take place in locations remote ...


Freezing history and depositional setting of massive ground ice in the Canadian High Arctic
Principal Investigator: Bell, Trevor
Licensed Year(s): 1993 1990 1988
Summary: This study will provide a better understanding of permafrost conditions in the high arctic as well as the environmental conditions that lead to permafrost formation. Study sites include the Fosheim Peninsula on Ellesmere Island and May Point and Mokka Fiord on eastern Axel Heiberg Island....


1. Hierarchy of stress tolerance for flowering plants in extreme polar desert. 2. Initial phase of primary succession following glacial retreat. 3. Life of plants in extreme environments. 4. Baker Lake experiment.
Principal Investigator: Svoboda, Josef
Licensed Year(s): 1994 1993 1992 1991 1988 1987
Summary: The aim of projects 1 and 2 is to learn how plants returned to the arctic following the retreat of the ice sheet that covered Ellesmere Island some 8000 years ago. This research will also help to determine what effect climate warming will have for the plant communities of the high arctic. Project 3 will involve the filming of plant life in the high arctic. Project 4 is part of an on-going study...


Late Quaternary history and paleoenvironmental change in the Lake Hazen Basin on Ellesmere Island
Principal Investigator: Smith, Rod
Licensed Year(s): 1993 1992
Summary: It is believed that during the last ice-age on northern Ellesmere Island, Lake Hazen was `pushed' further south as a result of the presence of glaciers. The researchers are investigating the Lake Hazen Basin area to determine the nature of this ancient lake. Sediment samples will be taken from both Lake Hazen as well as the surrounding area to study the past environment and organisms (now fossils...


Preglacial channel and sediment-fill of the ancestral Mackenzie River Valley between Wrigley and Fort Good Hope, NWT
Principal Investigator: Smith, Derald
Licensed Year(s): 1993
Summary: The Mackenzie River Valley, from Wrigley to Fort Good Hope, will be surveyed in order to document the nature of the river prior to the last glaciation. Sediments will be sampled in order to determine their age (using radiocarbon dating techniques). Field work will take place along the Mackenzie River between Wrigley and the mouth of the Redstone River, in the lower section of Gt. Bear River, and...


Eastern arctic climate of the past 2000 years: the Varved Lake sediment record
Principal Investigator: Overpeck, Jonathan
Licensed Year(s): 1993 1991 1989
Summary: The goal of our ongoing project is to collect samples of mud from the bottom of several undisturbed lakes on southern Baffin Island. In the laboratory, we will then examine the chemistry, texture and fossils found in this mud in an effort to document how the environment (mainly climate) of this region has changed over the past 2000 years. We hope that this work will eventually aid efforts to imp...


Carbonate sedimentation in the Mesoproterozoic Bylot Supergroup (Baffin Island, N.W.T.) and its influence on microbialite microstructure.
Principal Investigator: Kah, Linda
Licensed Year(s): 1994 1993
Summary: Stromatolites are variously shaped mounds or reefs composed of sediments and the fossilized remains of single-celled marine organisms called blue-green algae. There are massive fossil reefs located on Baffin Island which are some of the largest known of their age. By studying the structure, form and chemical make-up of these reefs, information about the ancient ocean and the growth of ancient re...


Palynological studies in the Mackenzie Observatory
Principal Investigator: Jette, Helene
Licensed Year(s): 1995 1993 1992
Summary: This project continues to examine the history of plant communities in the Mackenzie River and Delta regions over the past 15,000 years. Using a hand auger, core samples of sediments are taken from lake bottoms and the sediments are analyzed for the presence of pollen and diatoms. Radiocarbon dating, a technique used to estimate age, will estimate when certain species were present in the past....


Quaternary studies on the northern Quebec coast and offshore islands in the Hudson Strait, Northeastern Canada
Principal Investigator: Gray, James T.
Licensed Year(s): 1992
Summary: In previous years research, we have been able to prove the existence of an early opening of the Hudson Strait at the end of the last Ice Age, and to establish 4 important source areas for ice flows into Hudson Strait and Ungava Bay. Our 1992 work will permit us to expand and complete the work on several offshore islands, as well as sample from an exposure of old marine sediments in the Deception ...


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