Name/Title
Chinkapin with Bark Beetle DamageEntry/Object ID
05.58.190Description
Chemical Composition: Si O2
Crystal System: Hexagonal
Description: Family: Fagaceae
Genus: Castanopsis
Common Name: Chinkapin
Age: Tertiary
Location data: Badger Flat, Humboldt / Washoe County, Nevada USA
Description: Polished end is various shades of brown that shows very clear growth rings & rays, outer surface is a bleached multi-colored tones of tans, yellow, white, orange. The dent mark on the side of the specimen shows where hot pumice struck the wood during the volcanic eruption.
Type of Fossils Present: Plants
Fracture: conchoidal
Grain Size: Fine
Hardness: 7 Quartz
Luster: Glassy
Occurrence: Silicified wood, which is the fossilization and 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 related volcanic mudflow. The organic material in the wood is then replaced by silica (SiO2), other minerals determined its colors.
Pressure: Low-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 woods here are hydrous microcrystalline variety of quartz that can be generally termed as chalcedony.Collection
Petrified Wood CollectionAcquisition
Accession
05.58Source or Donor
Petrified Wood CollectionAcquisition Method
DonationOther Names and Numbers
Other Number
Other Number: 2005.58.190Dimensions
Width
3 inDepth
6 inLength
6 inDiameter
3 inDimension Notes
Dimension taken at widest pointsLocation
Location
Container
CenterDrawer
3rd ShelfShelf
RightCabinet
Case #101Wall
South wallRoom
Wood roomBuilding
Mentzer Hall - Petrified Wood RoomCategory
Permanent
