Yukon Overview - Energy, Mines and Resources
... The Foreland Belt is composed of deformed sedimentary rocks deposited on or adjacent to the stable North American craton. In the Yukon, the Foreland Belt covers the northern portion of the territory and includes the following major physiographic units: the British, Barn, Richardson and Northern Ogil ...
... The Foreland Belt is composed of deformed sedimentary rocks deposited on or adjacent to the stable North American craton. In the Yukon, the Foreland Belt covers the northern portion of the territory and includes the following major physiographic units: the British, Barn, Richardson and Northern Ogil ...
Commentary on schematic geological map of Antarctica Scale 1:10
... generated beneath rift valleys on Gondwana and caused them - and the formerly adjacent land masses - to migrate away from the Antarctic continent. The margins from where the Gondwana fragments split off are classed as passive (Anderson, 1991), and Antarctica's only convergent (or active) continenta ...
... generated beneath rift valleys on Gondwana and caused them - and the formerly adjacent land masses - to migrate away from the Antarctic continent. The margins from where the Gondwana fragments split off are classed as passive (Anderson, 1991), and Antarctica's only convergent (or active) continenta ...
First-Principles Theoretical Study of Molecular HCl Adsorption on a
... mol. In two other experimental studies, the activation energy for desorption was estimated. In the first study,32 molecular beams of HCl were reflected from amorphous and crystalline ice surfaces held at 100-126 K and were detected using mass spectroscopy, and a model was developed to obtain activat ...
... mol. In two other experimental studies, the activation energy for desorption was estimated. In the first study,32 molecular beams of HCl were reflected from amorphous and crystalline ice surfaces held at 100-126 K and were detected using mass spectroscopy, and a model was developed to obtain activat ...
Fast-decaying IP in frozen unconsolidated rocks and potentialities
... Unlike high-frequency dielectric permittivity, the available experimental data on the low-frequency dielectric permittivity ε s of frozen porous materials are not nearly so consistent, especially for materials with a high content of clay minerals. According to Olhoeft (1977) and Bittelli et al. (200 ...
... Unlike high-frequency dielectric permittivity, the available experimental data on the low-frequency dielectric permittivity ε s of frozen porous materials are not nearly so consistent, especially for materials with a high content of clay minerals. According to Olhoeft (1977) and Bittelli et al. (200 ...
2. - Teacher Friendly Guides
... Earth science is an inherently local subject. No two places share exactly the same sequence of events that led to the way they are today. In this sense, Earth science is a subject to be explored in one’s own neighborhood, examining the detailed sequence of rocks for the history that has gone on unde ...
... Earth science is an inherently local subject. No two places share exactly the same sequence of events that led to the way they are today. In this sense, Earth science is a subject to be explored in one’s own neighborhood, examining the detailed sequence of rocks for the history that has gone on unde ...
Low-temperature surface formation of NH3 and HNCO
... (see Raunier et al. 2003 and Theule et al. 2011, respectively) to form OCN− and NH4 + during a later stage of the molecular cloud evolution. Theule et al. 2011 found an activation energy barrier for reaction (7) of 3127 K, which is too high to make this reaction important for the conditions and time ...
... (see Raunier et al. 2003 and Theule et al. 2011, respectively) to form OCN− and NH4 + during a later stage of the molecular cloud evolution. Theule et al. 2011 found an activation energy barrier for reaction (7) of 3127 K, which is too high to make this reaction important for the conditions and time ...
Low-temperature surface formation of NH3 and HNCO
... (see Raunier et al. 2003 and Theule et al. 2011, respectively) to form OCN− and NH4 + during a later stage of the molecular cloud evolution. Theule et al. 2011 found an activation energy barrier for reaction (7) of 3127 K, which is too high to make this reaction important for the conditions and time ...
... (see Raunier et al. 2003 and Theule et al. 2011, respectively) to form OCN− and NH4 + during a later stage of the molecular cloud evolution. Theule et al. 2011 found an activation energy barrier for reaction (7) of 3127 K, which is too high to make this reaction important for the conditions and time ...
Glacial geology of Bayan Har Shan, northeastern
... represented an icefield or ice cap-type of glaciation. ...
... represented an icefield or ice cap-type of glaciation. ...
The Late Cenozoic uplift – climate change paradox
... the albedo. Topography exerts a primary control because snow persists longer in higher areas. It has long been recognized that there is a close relationship between climate and the topography of the earth’s surface. Hay (1996) presented a review of many aspects of this complex topic. Large-scale reg ...
... the albedo. Topography exerts a primary control because snow persists longer in higher areas. It has long been recognized that there is a close relationship between climate and the topography of the earth’s surface. Hay (1996) presented a review of many aspects of this complex topic. Large-scale reg ...
Surface-wave analysis for identifying unfrozen zones in subglacial
... determine the inversion parameters for studying the sediment below the glacier, we conduct a simulation study (Figure 1). Since the unfrozen zones at the ice–sediment interface should have lower S-wave velocities than pure ice (e.g., Johansen et al., 2003), we use low-velocity layer models (Figure 1 ...
... determine the inversion parameters for studying the sediment below the glacier, we conduct a simulation study (Figure 1). Since the unfrozen zones at the ice–sediment interface should have lower S-wave velocities than pure ice (e.g., Johansen et al., 2003), we use low-velocity layer models (Figure 1 ...
Canadian Shield - Prairie Research Institute
... near saturation during the thaw season. Among the forms in this category are various types of sorted and unsorted circles (Washburn, 1956) or mudboils (Fig. 5; Shilts, 1978); subparallel straight to sinuous rib and trough structures (Fig. 6; Shilts and Dean, 1975) that occur at water depths of less ...
... near saturation during the thaw season. Among the forms in this category are various types of sorted and unsorted circles (Washburn, 1956) or mudboils (Fig. 5; Shilts, 1978); subparallel straight to sinuous rib and trough structures (Fig. 6; Shilts and Dean, 1975) that occur at water depths of less ...
600 million years of climate change
... The role of carbon dioxide, as a greenhouse gas, is emphasized since it is an important factor influencing the global climate. During the last century, a non-negligible increase in the atmospheric concentration of CO2 brought about a rise in global temperature attributed by many scientists to a man- ...
... The role of carbon dioxide, as a greenhouse gas, is emphasized since it is an important factor influencing the global climate. During the last century, a non-negligible increase in the atmospheric concentration of CO2 brought about a rise in global temperature attributed by many scientists to a man- ...
- International Association of Geomorphologists
... Backwall The curved, steep head wall of a landslip scar or a glacial cirque Backwash Also known as 'swash', the backwards flow of water on a beach Backwearing or backwasting A process of lateral recession of slopes in which there is no loss of steepness Badlands Deeply dissected erosional landscapes ...
... Backwall The curved, steep head wall of a landslip scar or a glacial cirque Backwash Also known as 'swash', the backwards flow of water on a beach Backwearing or backwasting A process of lateral recession of slopes in which there is no loss of steepness Badlands Deeply dissected erosional landscapes ...
Atmospheric K-feldspar as a potential climate modulating
... up to follow the order of controls. The relevant large-scale secular and episodic Earth-system processes are stacked in parallel though time. The minimum is zero—before Kfs existed on Earth and during probable times of total land coverage by ice. While today’s flux is estimated in relation to the pa ...
... up to follow the order of controls. The relevant large-scale secular and episodic Earth-system processes are stacked in parallel though time. The minimum is zero—before Kfs existed on Earth and during probable times of total land coverage by ice. While today’s flux is estimated in relation to the pa ...
Atmospheric K-feldspar as a potential climate modulating agent
... up to follow the order of controls. The relevant large-scale secular and episodic Earth-system processes are stacked in parallel though time. The minimum is zero—before Kfs existed on Earth and during probable times of total land coverage by ice. While today’s flux is estimated in relation to the pa ...
... up to follow the order of controls. The relevant large-scale secular and episodic Earth-system processes are stacked in parallel though time. The minimum is zero—before Kfs existed on Earth and during probable times of total land coverage by ice. While today’s flux is estimated in relation to the pa ...
P-wave velocity changes in freezing hard low
... cliffs in permafrost regions mostly consist of hard lowporosity rocks (< 10 %), according to Tiab and Donaldson’s (2004) definition, and the applicability of electrical and seismic methods to these is yet unclear. While the relationship between electrical resistivity and frozen low-porosity bedrock ...
... cliffs in permafrost regions mostly consist of hard lowporosity rocks (< 10 %), according to Tiab and Donaldson’s (2004) definition, and the applicability of electrical and seismic methods to these is yet unclear. While the relationship between electrical resistivity and frozen low-porosity bedrock ...
Classification of Alberta Landforms
... dramatic (e.g., landslides), others, such as the chemical, physical, or biological breakdown of rocks into soil, may be barely perceptible even over several human life spans. Processes vary in space and time in both intensity and type. For example, less than 20,000 years ago, Alberta was almost enti ...
... dramatic (e.g., landslides), others, such as the chemical, physical, or biological breakdown of rocks into soil, may be barely perceptible even over several human life spans. Processes vary in space and time in both intensity and type. For example, less than 20,000 years ago, Alberta was almost enti ...
Variable seasonal coupling between air and ground temperatures: A
... means invalidate the assumption that air and ground temperatures track each other over long timescales. Only if differences between mean annual air and shallow subsurface temperatures change systematically over long times and large regions would GST reconstructions lose credibility as estimates of c ...
... means invalidate the assumption that air and ground temperatures track each other over long timescales. Only if differences between mean annual air and shallow subsurface temperatures change systematically over long times and large regions would GST reconstructions lose credibility as estimates of c ...
Variable seasonal coupling between air and ground temperatures: A
... means invalidate the assumption that air and ground temperatures track each other over long timescales. Only if differences between mean annual air and shallow subsurface temperatures change systematically over long times and large regions would GST reconstructions lose credibility as estimates of c ...
... means invalidate the assumption that air and ground temperatures track each other over long timescales. Only if differences between mean annual air and shallow subsurface temperatures change systematically over long times and large regions would GST reconstructions lose credibility as estimates of c ...
Geology of High Point State Park
... opportunity to learn about New Jersey’s geology and its role in shaping the landscape. The park (fig. 1) lies on Kittatinny Mountain in the glaciated part of the Ridge and Valley physiographic province in northern New Jersey. It consists of about 20 square miles of hilly forest, rocky ridge crests, ...
... opportunity to learn about New Jersey’s geology and its role in shaping the landscape. The park (fig. 1) lies on Kittatinny Mountain in the glaciated part of the Ridge and Valley physiographic province in northern New Jersey. It consists of about 20 square miles of hilly forest, rocky ridge crests, ...
Cooperative Hydration of Pyruvic Acid in Ice
... were obtained whether the corresponding temperatures were reached along cooling or warming sequences. The same QH values were recovered >60 min after the frozen solutions had reached thermal equilibrium. Because reactions (1, -1) are known to exhibit acid catalysis in solution,33,36 the fact that QH ...
... were obtained whether the corresponding temperatures were reached along cooling or warming sequences. The same QH values were recovered >60 min after the frozen solutions had reached thermal equilibrium. Because reactions (1, -1) are known to exhibit acid catalysis in solution,33,36 the fact that QH ...
The Outer Hebrides - Scottish Natural Heritage
... The main chain of the Outer Hebrides, from Berneray to Lewis, is made up of some of the oldest rocks in Europe. These rocks have been known as the ‘Lewisian gneisses’ since the late 19th century, and are named after the Isle of Lewis. They also occur in the northwestern part of the Scottish mainland ...
... The main chain of the Outer Hebrides, from Berneray to Lewis, is made up of some of the oldest rocks in Europe. These rocks have been known as the ‘Lewisian gneisses’ since the late 19th century, and are named after the Isle of Lewis. They also occur in the northwestern part of the Scottish mainland ...
Solid Earth Applications of GOCE and GRACE Data
... Greenland mass loss, Science, 326, 984986, 2009, shows. Interpretations in terms of present-day ice mass change are not straightforward, though, as solid-earth deformation due to land ice variations over the past 20,000 years also contribute to temporal mass change as detected by GRACE. ...
... Greenland mass loss, Science, 326, 984986, 2009, shows. Interpretations in terms of present-day ice mass change are not straightforward, though, as solid-earth deformation due to land ice variations over the past 20,000 years also contribute to temporal mass change as detected by GRACE. ...
Cryosphere
The cryosphere (from the Greek κρύος kryos, ""cold"", ""frost"" or ""ice"" and σφαῖρα sphaira, ""globe, ball"") is those portions of Earth's surface where water is in solid form, including sea ice, lake ice, river ice, snow cover, glaciers, ice caps, ice sheets, and frozen ground (which includes permafrost). Thus, there is a wide overlap with the hydrosphere. The cryosphere is an integral part of the global climate system with important linkages and feedbacks generated through its influence on surface energy and moisture fluxes, clouds, precipitation, hydrology, atmospheric and oceanic circulation. Through these feedback processes, the cryosphere plays a significant role in the global climate and in climate model response to global changes. The term deglaciation describes the retreat of cryospheric features.