from The Century Dictionary.
- In geology, not exhibiting the effects of glaciation: specially applied to boulders or rock-ledges, or even areas of land, which lie north of the limits of ice action in the Glacial Epoch.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- adjective Not
from Wiktionary, Creative Commons Attribution/Share-Alike License
In northwestern and north central Pennsylvania, soils on the upper slopes of unglaciated sites contain low calcium and magnesium supplies as a result of more than half a million years of weathering combined with the leaching of these elements by acid deposition.
Acid rain 2010
Such is the case for the unglaciated lowlands of many arctic islands where special ecological niches, such as found at Polar Bear Pass on Bathhurst Island or Truelove Lowland on Devon Island, are produced by unique hydro-climatic regimes and are largely dependent on ponded water produced by spring snowmelt.
In unglaciated terrain, landslides on failed ash beds have occurred, producing rounded hills.
It was unglaciated during the Pleistocene epoch, when it served as a refuge for northern plant species.
Ecoregion 43 is largely an unglaciated, semiarid, and rolling plain that is underlain by shale, siltstone, and sandstone.
Its glaciated ridgetops are less sharp, and much more lake-studded than those of its lithologically similar, but unglaciated, neighbor in Pennsylvania, the Northern Sandstone Ridges (67c).
The glaciated Erie Drift Plain is characterized by low rounded hills, scattered end moraines, kettles, and areas of wetlands, in contrast to the adjacent unglaciated ecoregions (70, 62) to the south and east that are more hilly and less agricultural.
Dry conditions were also prevalent at this time in unglaciated areas such as northwestern Alaska and portions of the Yukon, where a 60 to 80 m reduction in sea level increased distances to marine moisture sources by several hundred kilometers.
The traditional caribou hunting grounds of the Vuntut Gwitchin are located within the caribou range of the Porcupine Caribou Herd, a region referred to as the Yukon – Alaska Refugium (see Arctic Climate Impact Assessment (ACIA), Chapter 11), and considered to have been unglaciated throughout the four glacial epochs.
Large areas of the center of the Park have remained unglaciated for up to 300,000 years.