The end of the last glacial period, which was about 10,000 years ago, is often called the end of the ice age, although extensive year-round ice persists in Antarctica and Greenland. Over the past few million years, the glacial-interglacial cycles have been "paced" by periodic variations in the Earth's orbit via Milankovitch cycles .

During the last Ice Age, glaciers advanced into the middle of North America, grinding underlying rock into dust-like "glacial flour." As temperatures warmed, the glaciers retreated and vast amounts of meltwater and sediment flooded the Missouri River Valley .

Jul 29, 2008 · Deposition of this sediment, which is known as löess, is attributed to the climatic conditions that prevailed during the Ice Ages, and to the abundant supply of silt-sized particles generated by rock-to-rock abrasion within alpine and continental glaciers.

Over an estimated 2,500 years the sequence of the ice dam forming, the lake filling, the dam failing, and catastrophic flooding, was repeated dozens of times. This collective sequence is what is considered the "Ice Age Floods".

Nov 1, 2013 · Optically stimulated luminescence (OSL) ages provide the first detailed chronology of Peoria Loess at Loveland. Deposition began after ~ 27 ka and continued until ~ 17 ka. OSL ages also indicate that mass accumulation rates (MARs) of loess were not constant.

Loess is one of the most extensive surficial geologic deposits in midcontinental North America, particularly in the central Great Plains region of Nebraska. Last-glacial-age loess (Peoria...

During the Ice Age, glaciers advanced down into the mid-continent of North America, grinding underlying rock into a fine powderlike sediment called "glacial flour." As temperatures warmed, the glaciers melted and enormous amounts of water and …

However, other times any one of the various glacial periods, which lasted only thousands of years, may be referred to as an ice age. Here, we're discussing the longer, inclusive ice age, the one more technically known as the Pleistocene epoch in the geological time scale.

Oct 23, 2024 · Loess in midcontinental North America provides a detailed record of sediment source and routing during multiple middle to late Pleistocene glacial cycles, which provides valuable terrestrial insight regarding Laurentide ice sheet dynamics.

loess. Throughout the Ice Age, melting glaciers left behind a mixture of sand and gravel deposits called outwash. Prevailing westerly winds swept across the outwash plains, picking up the finer materials, and blowing them eastward where they settled as loess deposits. Former glacial sluiceways, now partly occupied by such rivers as the