Name/Title
OakEntry/Object ID
05.58.133(a)Description
Assemblage Zone: sedimentary
Chemical Composition: Si O2
Crystal System: Hexagonal
Description: Family: Fagaceae
Genus: Quercus
Common Name: Oak
Age: Miocene
Location data: Stinking Water Mountain, Oregon
Description: Thin slab with polished face. A half-round specimen with dark and light reddish-brown outer edges and a distinct light greyish-brown center area with light striations. Some growth rings are visible.
Type of Fossils Present: Plants
Fracture: conchoidal
Grain Size: Fine
Hardness: 7 Quartz
Luster: Glassy
Occurrence: Silicified wood, which is the fossilization and/or opalization of organic woody matter by the deposition 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 or volcanic related mudflow. The organic material in the wood is then replaced by silica, other minerals determined the colors of the petrified wood.
Pressure: Moderate
Rock Color: Medium
Rock Origin: Post-depositional
Rock Type: Sedimentary
Specific Gravity: 2.6
Surface Process: Not apparent
Streak: white
Temperature: Low
Texture: microcrystalline
Variety: Petrified wood is hydrous microcrystalline variety of quartz that can be defined in general term of chalcedony or opalizationCollection
Petrified Wood CollectionOther Names and Numbers
Other Number
Other Number: 05.58.133(a)Dimensions
Width
9-1/2 inDepth
3 inLength
20-1/2 inDimension Notes
Dimension taken at widest pointsLocation
Location
Shelf
PW-2-ARoom
Petrified Wood RoomBuilding
Crater Rock MuseumCategory
ExhibitMoved By
Jillian Mather KettleyDate
August 1, 2025Notes
Location added when performing inventory
