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#geology

101 posts70 participants2 posts today
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Astro Hawk (Ian Kluft) 🚀🛰️

"Moonquakes Surprisingly Common" is #NASA #astronomy picture of the day (#APOD) - Seismometers left by Apollo crews continued to transmit #quake data for years. Data from max sensor network installation in 1972 until 1977 shows moonquakes are more common than earthquakes. One theory about why says that could be caused by tidal influence from Earth's gravity. Future lunar stations and settlements will need to plan for quakes. apod.nasa.gov/apod/ap250406.ht #planetary #geology

NASA Apollo 11 photo of Buzz Aldrin standing next to the first lunar seismometer, which he and Armstrong had installed NASA APOD image caption https://apod.nasa.gov/apod/ap250406.html Why are there so many moonquakes? Analyses of seismometers left on the moon during the Apollo moon landings reveal a surprising number of moonquakes occurring within 100 kilometers of the surface. In fact, 62 moonquakes were detected in data recorded between 1972 and 1977. Many of these moonquakes are not only strong enough to move furniture in a lunar apartment, but the stiff rock of the moon continues to vibrate for many minutes, significantly longer than the softer rock earthquakes on Earth. The cause of the moonquakes remains unknown, but a leading hypothesis include tidal gravity from -- and relative heating by -- our Earth. Regardless of the source, future moon dwellings need to be built to withstand the frequent shakings. Pictured here, Apollo 11 astronaut Buzz Aldrin stands beside a recently deployed lunar seismometer, looking back toward the lunar landing module.
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John Faithfull 🌍🇪🇺🏴󠁧󠁢󠁳󠁣󠁴󠁿🧡✊🏻✊🏿

Excellent visit earlier this week to Torosay Sand Limited's gravel quarry in eastern Mull. Most of the quarry consists of bedded gravel and sand deposited by glacial melt rivers around 16 to 15 thousand years ago when most of Scottish glacier ice melted away. But these are overlain by a couple of meters of grey till produced by local Mull glaciers during the "Loch Lomond Readvance" when ice grew again in western Scotland between about 13000 and 11700 years ago. #Geology #Glaciation #Mull

The side of a gravel quarry viewed from below, looking up to a blue blue sky with a little fluffy cloud, and some trees and fence posts on the skyline. Most of the quarry face consists of gravel and sand layers, with rounded pebbles and boulders, but the top layer, just below modern vegetation, is a massive grey layer of clay with scattered boulders.
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Adi
🐚Most likely an Acteonella fossil, estimated to be around 70 million years old. This region was once covered by sea, and one of the nearby mountains was a massive coral reef in ancient times—traces of a long-lost ocean world, now hidden in stone.

Shot with my #nikon d500. More to follow :)

#Fossil #Paleontology #Acteonella #Ancient #Sea #Geology #Nature #History #Earth #Science #Photography #Explore #Nature #Wild #Us #usa #canada #Europe #Travel #Discovery #Eu #Romania #Silentsunday #Macro #Photo #art #naturephotography #travel #pixelfed #mastodon


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Continued thread
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Ian Kluft 🖥️📡

On today's bike ride, I stopped at Lewis & Clark State Park. It's at the Sandy River Delta where it flows into the Columbia River. The Lewis & Clark expedition named the Sandy River because when they got there in 1805, it had been overrun a few years earlier by a mudflow from an eruption of Mt Hood. It's completely regrown today. #Portland #PNW #cycling #volcano #geology #history

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💧🌏 Greg Cocks

Reading Material With Lunch, Etc – Getting Back To My Roots
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doi.org/10.4324/9780429270284 | Thornes, J. B., Brunsden, D. (1977). Geomorphology and time. London: Methuen
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I saw this book on another post - and so went and found a copy at a 2nd hand book shop…
Looking forward to lunches at work with a cup of tea and maybe a couple of rainy Sundays at home…
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#geomorphology #text #book #landforms #learning #refamiliarisation #readingforpleasure #framework #model #processes #geology #water #hydrology #weather #climate #erosion #time #spatialanalysis #spatiotemporal #temporal #qualitative #quantitative #change #stochastic #evolution

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