File:Sequoia sempervirens (fossil redwood tree trunks) (Sonoma Volcanics, Upper Pliocene, 3.2 to 3.4 Ma; Calistoga Petrified Forest, Calistoga, California, USA) 84 (49097679201).jpg
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DescriptionSequoia sempervirens (fossil redwood tree trunks) (Sonoma Volcanics, Upper Pliocene, 3.2 to 3.4 Ma; Calistoga Petrified Forest, Calistoga, California, USA) 84 (49097679201).jpg |
Sequoia sempervirens (Don in Lambert, 1824) - quartz- permineralized coast redwood tree trunks in the Pliocene of California, USA. The trees at this locality have also been identified as Sequoia langsdorfii. The Calistoga Petrified Forest has been called the best-anywhere petrified forest of Pliocene age. The fossil wood here is preserved with the most common permineralization mineral - quartz. The preservation of these trees was the result of burial by a rhyolitic volcanic ash-flow tuff of the Sonoma Volcanics (Upper Pliocene). The volcanic tuff was erupted from a vent near modern-day Mt. St. Helena (= north of this locality). The fossil redwood trees here are nicknamed the "Ollie Bockee Trees". [From park signage:] In memory of Ollie Bockee, who in 1914 purchased this property and by charging 50 cents admission, was able to pay geology students to uncover more trees to further develop the forest. Classification: Plantae, Pinophyta, Pinopsida Pinales, Cupressaceae Stratigraphy: Sonoma Volcanics, Upper Pliocene, 3.2 to 3.4 Ma Locality: Ollie Bockee Trees, Calistoga Petrified Forest, northern side of Petrified Forest Road, west-southwest of the town Calistoga, eastern Sonoma County, Coast Ranges of northwest-central California, USA See info. at: <a href="https://en.wikipedia.org/wiki/Petrified_Forest_(California)" rel="noreferrer nofollow">en.wikipedia.org/wiki/Petrified_Forest_(California)</a> |
Date | |
Source | Sequoia sempervirens (fossil redwood tree trunks) (Sonoma Volcanics, Upper Pliocene, 3.2 to 3.4 Ma; Calistoga Petrified Forest, Calistoga, California, USA) 84 |
Author | James St. John |
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This image was originally posted to Flickr by James St. John at https://flickr.com/photos/47445767@N05/49097679201 (archive). It was reviewed on 23 November 2019 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
23 November 2019
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current | 02:43, 23 November 2019 | 3,000 × 3,086 (8.15 MB) | Ser Amantio di Nicolao (talk | contribs) | Transferred from Flickr via #flickr2commons |
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Camera manufacturer | Canon |
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ISO speed rating | 80 |
Date and time of data generation | 18:20, 14 July 2010 |
Lens focal length | 8.295 mm |
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Orientation | Normal |
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Horizontal resolution | 180 dpi |
Vertical resolution | 180 dpi |
Software used | Adobe Photoshop Elements 16.0 (Macintosh) |
File change date and time | 19:22, 20 November 2019 |
Y and C positioning | Co-sited |
Exif version | 2.21 |
Date and time of digitizing | 18:20, 14 July 2010 |
Meaning of each component |
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APEX aperture | 3.34375 |
APEX exposure bias | 0 |
Maximum land aperture | 3.34375 APEX (f/3.19) |
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File source | Digital still camera |
Custom image processing | Normal process |
Exposure mode | Auto exposure |
White balance | Auto white balance |
Digital zoom ratio | 1 |
Scene capture type | Landscape |
Lens used | 6.2-18.6 mm |
Date metadata was last modified | 14:22, 20 November 2019 |
Unique ID of original document | 689EF93C2A67970105D0FCB891B3918B |