File:Sequoia sempervirens (redwood) (Scotia, California, USA) (49748182702).jpg

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Sequoia sempervirens (Don in Lambert, 1824) - redwood (public display, Cincinnati Museum of Natural History & Science, Cincinnati, Ohio, USA)

The study of tree rings is dendrochronology. It can be used to date geologic events (such as volcanic eruptions), with a limit of about 12,000 years. Dendrochronology is also used to obtain information about climate and paleoclimates. Tree rings are preserved in many pieces of fossil wood - some samples have no tree rings at all, indicating the plants lived in non-seasonal environments (i.e., tropics).

From exhibit signage:

This cross section of a redwood (Sequoia sempervirens) from Scotia, California, was donated to our museum in 1938 by Leland Banning. The piece was purchased for about $35 and shipped here for about the same amount.

This slice came from a section about midway up the tree. Since the tree germinated around 528 A.D. and was cut down in the early 1930s, there are approximately 1400 annual rings.

Classification: Plantae, Pinophyta, Pinopsida Pinales, Cupressaceae

Locality: at or near the town of Scotia, Humboldt, northwestern California, USA

See info. at: <a href="https://en.wikipedia.org/wiki/Dendrochronology" rel="noreferrer nofollow">en.wikipedia.org/wiki/Dendrochronology</a> and

<a href="https://en.wikipedia.org/wiki/Sequoia_sempervirens" rel="noreferrer nofollow">en.wikipedia.org/wiki/Sequoia_sempervirens</a>
Date
Source Sequoia sempervirens (redwood) (Scotia, California, USA)
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@N05/49748182702. It was reviewed on 14 April 2020 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0.

14 April 2020

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current03:00, 14 April 2020Thumbnail for version as of 03:00, 14 April 20201,549 × 1,876 (2.49 MB)Poldavia (talk | contribs)Transferred from Flickr via #flickr2commons

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