Although the spatiotemporal oscillations of Greenland Ice Sheet (GrIS) during last millennia have played a prominent role in global environmental changes, its glacial response to natural variability still needs be better constrained. Here, we focused on reconstruction behavior and deglaciation process along Tyroler Valley (74° N, 22° E), within Northeast National Park. This NW-SE valley connect...

Armillaria isolates were collected from a unique forest ecosystem in the Niobrara Valley Preserve in Nebraska, USA, which comprises a glacial and early postglacial refugium in the central plains of North America. The isolates were collected from diverse forest trees representing a unique mixture of forest types. Combined methods of rDNA sequencing and flow cytometric measurements of nuclear DNA...

Study of Landsat imagery prompted Cannon (1) to suggest that Sithylemenkat Lake in central Alaska occupies a meteorite impact crater. In support of his thesis, he cites physiographic, structural, geochemical, and aeromagnetic evidence from various published sources. We believe, on the basis of our previous work in the area (2-4), that Cannon has largely misinterpreted these published data, whic...

The Quaternary Geology of the eastern South Bend 30- x 60-Minute Quadrangle in Indiana represents landforms and near-surface sediments deposited during Wisconsin Episode, Late Pleistocene. Sediments reflect interplay between Saginaw Michigan Lobes Laurentide Ice Sheet. A relatively shallow, buried pre-Wisconsin mid-Wisconsin morphology has been overridden by advances leading to Last Glacial Max...

The identification of valley networks and channels is an essential tool for geomorphological interpretations of the fluvial, glacial and volcanic history of Mars. While the creation of valley networks by erosion is an accepted hypothesis, the flow of water as the sole cause has recently been put into question [1]. To investigate the origin of the networks, their detailed properties have to be m...

Isolated, laterally extensive, gently sloping surfaces known as summit flats are present at high elevations in many Laramide ranges, and are particularly well developed in the Uinta Mountains of northeastern Utah. To investigate the spatial distribution of these surfaces, and to consider possible controls on this pattern, a map of summit flats in the Uintas was developed from digital elevation ...

Paleoglacial reconstructions in the European Alps have mainly focused on specific climatic periods such as Last Glacial Maximum (LGM) or Younger Dryas, with few studies investigating post-LGM Alpine glacier fluctuations encompassing broader temporal periods. In this study, we present a detailed reconstruction of glacial history Dora Baltea catchment, which hosted one main Quaternary systems wes...

Introduction: The McMurdo Dry Valleys of Antarctica have commonly been used as an analog for Mars; analogies are due in part to the regions hyperarid and cold climate as well as its abundance of similar-appearing microscale and macroscale morphological features such as gullies, lineated valley fill, and polygons [eg. 1,2,3]. With the recent direct observations of water ice on Mars from the NASA...

Abstract Alpine glacial erosion exerts a first‐order control on mountain topography and sediment production, but its mechanisms are poorly understood. Observational data capable of testing transport laws in models mostly lacking. New insights, however, can be gained from detrital tracer thermochronology. Detrital thermochronology works the premise that thermochronometer bedrock ages vary system...