Name/Title
SycamoreEntry/Object ID
78.58.460Description
Assemblage Zone: Plaleogene gravel
Chemical Composition: Si O2
Crystal System: Hexagonal
Description: Family: Proteacea
Genus: Platanus
Species; Platanaceae
Common name: Sycamore
Age: Eocene
Location data: Clarno Formation, Post, Oregon
Description: Complete large round slab polished face shows a very black with white agate running through it.
Size: 19.00"x 14.500"x 1.00"
Type of Fossils Present: Plants
Grain Size: Fine
Hardness: 7 Quartz
Lithofacies: Tropical to subtropical
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 CollectionAcquisition
Accession
78.58Source or Donor
Delmar Smith Petrified Wood CollectionAcquisition Method
DonationOther Names and Numbers
Other Number
Other Number: 1978.58.460Dimensions
Width
14-1/2 inDepth
1 inLength
19 inDimension Notes
Dimensions taken at widest pointsLocation
Location
Display Case
PW-8Room
Petrified Wood RoomBuilding
Crater Rock MuseumCategory
ExhibitMoved By
Jillian Mather KettleyDate
May 28, 2025Notes
Location update
