The NE margin of the Big Obsidian Flow, erupted from a vent near the south caldera wall of Newberry volcano about 1300 years ago, flowed into the crater of a pumice ring, whose forested rim is seen at the left and center.  The pumice ring formed during an earlier Holocene eruption about 6400 years ago. Photo by Lee Siebert, 1981 (Smithsonian Institution).
{"Image ImageWidth": "1463", "Image ImageLength": "971", "Image BitsPerSample": "[8, 8, 8]", "Image Compression": "LZW", "Image PhotometricInterpretation": "2", "Image Orientation": "Horizontal (normal)", "Image SamplesPerPixel": "3", "Image XResolution": "159449/5000", "Image YResolution": "159449/5000", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "Adobe Photoshop 21.2 (Windows)", "Image DateTime": "2020:10:07 19:09:40", "Image ExifOffset": "244", "Thumbnail Compression": "JPEG (old-style)", "Thumbnail XResolution": "72", "Thumbnail YResolution": "72", "Thumbnail ResolutionUnit": "Pixels/Inch", "Thumbnail JPEGInterchangeFormat": "382", "Thumbnail JPEGInterchangeFormatLength": "5323", "EXIF ColorSpace": "Uncalibrated", "EXIF ExifImageWidth": "1024", "EXIF ExifImageLength": "680"}