Name/Title
SequoiaEntry/Object ID
05.58.9Description
Assemblage Zone: sedimentary
Chemical Composition: Si O2
Crystal System: Hexagonal
Description: Family: Taxodium
Genus: Sequoia
Common name: Sequoia
Age: Oligocene
Location data: Jackson County, Oregon
Roxy Ann Formation,
Description: Delmar describes this piece as the polished side shows definite growth rings. Colors range from beiges, greys, oranges, red and black.Some cracks seen and some silicate filled. Piece was from a twin log. One log was rotten and this log was alive; shown from brown along one edge. Doug Foster describes this specimen as a Sequoia.
Size: 13.500"x 8.250"x .675"
Type of Fossils Present: Plants
Grain Size: Fine
Hardness: 7 Quartz
Luster: Glassy
Occurrence: Silicified wood, which is the fossilization and opalization of organic woody matter by the deposation of SiO2 in a anaerobic environment to prevent decay. This means that the wood must somehow be buried in an oxygen free enviroment, possibly in the silt-laden river or the bottom of a lake or buried by volcanic ash.
Pressure: Low-Moderate
Rock Color: Medium
Rock Origin: Terrestrial
Rock Type: Sedimentary
Specific Gravity: 2.6
Surface Process: Not apparent
Temperature: Low
Texture: microcrystalline
Variety: Petrified woods here are hydrous microcrystalline variety of quartz that can be generally termed as chalcedony or opal.Collection
Petrified Wood CollectionLocation
* Untyped Location
Petrified Wood Room