silex_spring_pano_04522-31
14 Jul 22 There are 3 major features to my way of thinking in the Lower Geyser Basin plus a series of several lessor features, mostly fumaroles. We've looked at two of these major features, the Fountain Paint Pots (mud pots) and Red Spouter prior, today we look at the third, Silex Spring. This one is actually the first feature you encounter as you leave the parking lot and begin your trip along the boardwalk. Silex Spring is named for the large amount of silica found in and around this feature. Silex is Latin for silica which comes from the underlying volcanic rocks, which its hot waters dissolve. This silica is then deposited as sinter, which lines the pool and forms the highly colored terraces along the runoff channels which reach all the way to the parking area. As with the other thermal features, thermophiles thrive in these hot waters, which as I've written previously give the channels such a variety of textures and colors. Silex Spring has an average temperate of 174.7°F (79.3°C) and an average pH of 8.4 making it somewhat alkaline. It last erupted in 2006. This spring overflows most of the year. This hot environment is perfect for the thermophiles which become food for several kinds of flies that live in and on the hot water who in turn then become food for mites, spiders, various insects and birds. A little ecosystem that most folks miss due to the beauty of the colored pools of water. Lots of signage warning about the dangers of the hot water but none talking about the contained ecosystem. I presented these thermal features out of order; you first encounter Silex Spring, then the Fountain Paint pots, and then Red Spouter. You can see it all in 15 minutes, or a couple of hours, depending on how much you want to take in. Directly above the top of the frame is the Grand Loop Road but you'll likely not notice the spring as you drive along past it.
This 10 pane pano is straight from the camera save for a wee bit of contrast enhancement and cropping for interest. Roadside Spring Nikon D500; 18 - 200; Aperture Priority; ISO 200; 1/640 sec @ f / 9.