earthstory reblogged
Gulls
outerbostonia
March 12, 2019
Irish Sand Volcano This is a cross section of a “sand volcano” from Clare County, Ireland. These features are found in the Carboniferous aged Gull Island formation – a deposit of marine shales and sandstones. About 300 million years ago, this area was shaken by large enough earthquakes to produce liquefaction of water-rich sediment. The mixture of water and sand, pressurized by the weight of the layers above, broke through to the surface and erupted, forming a feature called a sand boil/sand blow or a sand volcano. These ancient sand volcanoes have been buried and lithified over time; similar features have been observed associated with large modern earthquakes (https://tmblr.co/Zyv2Js2NjegtT). -JBB Image credit: http://bit.ly/2z1A14T Reference: http://bit.ly/2z2sti8 https://www.geolsoc.org.uk/GeositesKilkee
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earthstory reblogged
Big Basin State Park is home to a wide assortment of ecosystems. The park starts inland and works its way to the Pacific Ocean ending at Waddell Beach. This beach is right along Highway 1 and may just be the perfect place for a picnic. As with all beaches, the material on the beach is made from the local geology. And as the Pacific Coast is near an active plate boundary the beaches in California are rocky. Rocks of all shapes and sizes are washed up on the beach and are polished as they ride the waves. And here most rocks are of different types of chert which are common in Northern California. Tidepools are also common here as well as many other beaches in the area. This beach is rather calm for being right off Highway 1. Kites join the many gulls flying above the waves, only falling at the end of a breeze.
Chronophotography
These amazing photos are sequential shots of a variety of birds in flight revealing the pattern that they make as they flow through time on their chosen flightpath. They were taken by Spanish photographer Xavier Bou in his home country of Spain. Here are the types of bird in the photos, which show that different species have radically varying flight habits that are in turn a reflection of their feeding and movement habits within their wider ecosystem-1: flamingoes 2: herring gulls 3: starlings 4: swifts.
Loz
Image credit: Xavi Bou/Rex/Shutterstock http://www.xavibou.com/ http://bit.ly/2e3qFbl
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