Located between the southern Rocky Mountains and Mexico s Sierra Madre Occidental, and biologically isolated for millennia, the higher elevations have provided refuge for relict populations of plants and animals with adaptive strategies rooted in Pleistocene ice age environmental conditions.
42.
The most recent form, the Late Pleistocene Ice Age leopard ( " P . p . spelaea " ), appeared at the beginning of the Late Pleistocene and survived until about 24, 000 years ago in several parts of Europe.
43.
The subspecies differentiation may have developed at the end of the Pleistocene Ice Ages due to the isolation of the Iberian Peninsula when glacier barriers grew in the Pyrenees and eventually reached the Gulf of Biscay in the West and the Mediterranean in the East.
44.
Instead, after a season of spiteful winter storms, the landscape still seemed to be trapped in a sort of late-Pleistocene ice age, with plenty of snow pack greeting the smattering of anglers who ventured forth for a largely fruitless session of casting.
45.
The "'Irish Sea Glacier "'was a huge glacier during the Pleistocene Ice Age that, probably on more than one occasion, flowed southwards from its source areas in Scotland and Ireland and across the Isle of Man, Anglesey and Pembrokeshire.
46.
For example, archeologists believe the first Mesolithic migrations ( JMmon ) traveled across to Honshu around the 10th century BC, supplanting Paleolithic people that walked from Asia to Japan overland over 100, 000 years ago when the sea level was lower during the Pleistocene ice age.
47.
The Blackburn area was subjected to glaciation during the Pleistocene ice age, and the sandstone-and-shale bedrock is overlain in much of the area by glacial deposits called till ( which is also called " boulder clay " ) of varying thickness up to several tens of feet.
48.
I know Snowball Earth was supposed to have been started when extra rain washing the carbon dioxide out of the atmosphere ( could that happen in a globally-warmed world ? ), but Pleistocene ice ages are supposed to be started by cold weather from Milakovich cycles, not rain washing the CO 2 away?
49.
At the end of the 19th and beginning of the 20th centuries, when scientists first realized that there had been glacial and interglacial ages, and that they were somehow associated with the prevalence or disappearance of certain animals, they surmised that the termination of the Pleistocene ice age might be an explanation for the extinctions.
50.
Pleistocene ice ages started 2 million years ago, and melt from alpine glaciers on the nearby Sierra Nevada Mountains fed a series of lakes that filled Death and Panamint valleys and surrounding basins ( see the top of the Saltpans and playas were created as ice age glaciers retreated, thus drastically reducing the lakes'water source.
