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Thursday, February 8, 2018

Strange Flow of Rocks is Remnant of Rock Glacier

This photo of Mt. Powell (10,168 ft.) in western Montana shows an impressive cirque, shaped by a glacier that once flowed from Powell’s northeast slope, down toward the valley of the Clark Fork River. According to geology maps, the strange flow-shaped mass of rocks near the bottom of the cirque was left by a “rock glacier”. Apparently during the final decades of Mt. Powell’s glacier, there were more rocks than ice in the mix. Eventually even the ice between the rocks melted away, and the rocks were left without a “ride”. From the summit, the deposit looks like a fluid blob of rocks, but without the matrix of ice the rocks are no longer flowing.

More about this hike - www.bigskywalker.com

More about rock glaciers from Geology.com.

Tuesday, January 30, 2018

Blue Moon, Super Moon, Lunar Eclipse of January 31, 2018

Here is a great resource for understanding/explaining the lunar eclipse that will happen early tomorrow morning (January 31). This will also be the second full moon of the month, therefore it is a "Blue Moon". . . AND it is a Super Moon as well! The graphic below illustrates the size difference between a smaller full moon and a super moon, which happens when a full moon occurs when the Moon is slightly closer to Earth. (Graphic courtesy of NASA/JPL - Caltech). Here is another resource - a blog post with several graphics and animations: CLICK HERE.