WINTER ON MOUNT WASHINGTON

Ecological Zones: A Hike Up Mount Washington

Spatial Factors Affect Primary Succession on the Muddy River Lahar, Mount St. Helens, Washington

We surveyed vegetation 28 summers after the 1980 eruption of Mount St. Helens, Washington spawned a massive lahar. Our goals were to describe vegetation patterns early in primary succession; determine factors associated with these patterns; and seek evidence for assembly rules. We determined species composition, plot position and surface features in 151 plots. Multiple regression, redundancy an...

Tertiary Low-angle Faulting and Related Gold and Copper Mineralization on Mount Washington, Vancouver Island

The structural style of Vancouver Island, ar perceived by thr author in the course of reconni!issance mapping for the Geological Survey of Canada. 1963 to 1981. was one of rather rigid tilted blocks. separated by numerous high-angle faults. That concept has now been shown to be incomplete and in need of revision. Firstly. deep seismic soundings carried out in I984 under the LITHOPROBE program. ...

Increasing deterministic control of primary succession on Mount St. Helens, Washington

Question: Does the relative importance of stochastic and deterministic factors change during primary succession? Location: Small depressions (potholes) located onMount St. Helens, Washington (4611305100N, 12210901000W, 1290m). Methods: Pothole vegetation was described in 1993, 1997 and from 2001 to 2008. Explanatory variables included location and elevation (spatial factors), soil factors and L...

A Chronology of Late Holocene Glacier Fluctuations on Mount Rainier, Washington

Lichenometric studies permit close dating for the timing of stabilization of the late Holocene moraines built by North Mowich, Carbon, Winthrop, Cowlitz, and Ohanapecosh glaciers on Mount Rainier. The moraine chronologies indicate synchronous responses among these glaciers during the past 200 yr. Periods of glacier recession began between 1768-1777, 1823-1830, 1857-1863, 1880-1885, 1902-1903, 1...