Name/Title
SycamoreEntry/Object ID
05.58.03Description
CRM/SOU DC1-3
Assemblage Zone: sedimentary
Chemical Composition: Si O2
Crystal System: Hexagonal
Description: Family: Platanaceae
Genus: Platanus-like
Common Name: Sycamore-like
Age: Late Eocene to Early Oligocene
Location data: Dry Creek, Jackson County, Oregon, USA
Description: Polished face shows colors white agate with some grey, brown, tan, beige pieces on wood in which you can see some grain . The outer side shows mostly agate with some grainy rusty tan colored wood.
Type of Fossils Present: Plants
Fracture: conchoidal
Grain Size: Fine
Hardness: 7 Quartz
Lithofacies: Nonmarine
Luster: Glassy
Occurrence: The Payne Cliff Formation is overlain by the nonmarine volcanic sediments of the Colestin Formation. The volcanic ash from the Colestin Formation vents covered an area from Lane County to the California board preserving the wood, leaves and pollen of thick forests of tropical to subttropical plants on the low coastal plain.
Pressure: Moderate
Rock Color: Medium
Rock Origin: Post-depositional
Rock Type: Sedimentary
Specific Gravity: 2.6
Surface Process: Not apparent
Streak: white
Temperature: Low to moderate
Texture: Mircrocrystalline
Variety: Petrified woods here are hydrous microcrystalline variety of quartz that can be generally termed as chalcedony.
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.Collection
Petrified Wood CollectionAcquisition
Accession
05.58Source or Donor
Petrified Wood CollectionAcquisition Method
DonationOther Names and Numbers
Other Number
Old Number: CRM/SOU DC-L-3; Other Number: 2005.58.03Dimensions
Width
5-3/4 inDepth
4-3/4 inLength
6-1/2 inDimension Notes
Dimension taken at widest pointsLocation
Location
Display Case
PW-7Room
Petrified Wood RoomBuilding
Crater Rock MuseumCategory
ExhibitMoved By
Jillian Mather KettleyDate
January 22, 2025Notes
Location/inventory
