Castle Geyser (during steam phase, not eruption) with the colorful bacteria mats of Tortoise Shell Spring in the foreground. While Castle Geyser has a 12 foot sinter cone that took 5,000 to 15,000 years to form, it is in fact situated atop geyserite terraces that themselves may have taken 200,000 years to form, making it likely the oldest active geyser in the park. Upper Geyser Basin.,  Copyright Phillip Colla, image #13427, all rights reserved worldwide.
{"Image ImageDescription": "Castle Geyser (during steam phase, not eruption) with the colorful bacteria mats of Tortoise Shell Spring in the foreground. While Castle Geyser has a 12 foot sinter cone that took 5,000 to 15,000 years to form, it is in fact situated atop geyserite terraces that themselves may have taken 200,000 years to form, making it likely the oldest active geyser in the park. Upper Geyser Basin.", "Image XResolution": "72", "Image YResolution": "72", "Image ResolutionUnit": "Pixels/Inch", "Image Software": "Adobe Photoshop Lightroom Classic 9.2 (Macintosh)", "Image DateTime": "2020:02:22 14:01:30", "Image ExifOffset": "572", "EXIF ExifVersion": "0231", "EXIF DateTimeOriginal": "2005:07:14 14:55:48", "EXIF DateTimeDigitized": "2005:07:14 14:55:48", "EXIF OffsetTime": "-08:00", "EXIF ColorSpace": "sRGB"}