Name/Title
Pepper TreeEntry/Object ID
05.58.61Description
Assemblage Zone: Lake Sediments
Chemical Composition: Si O2
Crystal System: Hexagonal
Description: Family: Anacardiaceae
Genus: Schinoxylon
Common Name: Pepper Tree
Age: Eocene
Location data: Blue Forrest, Eden Valley, Wyoming, USA
Green River Fm.
Description: Volcanic ash surrounding the tree limbon one side, colors whitish-beige calcareous rock sediment . 3/4 of the limb is present with both side and face view of the limb shown, colors are shades of brown and tans, and growth rings, rays can be seen, also there are crystal pockets on the side of the limb
Type of Fossils Present: Plants
Fracture: conchoidal
Grain Size: Fine
Hardness: 7 Quartz
Lithofacies: Volcanic Ash
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: Light
Rock Origin: Post-depositional
Rock Type: Sedimentary
Specific Gravity: 2.6
Surface Process: Not apparent
Temperature: Low
Texture: Microcrystalline
Variety: Petrified woods ar hydrous microcrystalline varieties of quartz that can be generally termed as chalcedony or opalized .Collection
Petrified Wood CollectionAcquisition
Accession
05.58Source or Donor
Petrified Wood CollectionAcquisition Method
DonationOther Names and Numbers
Other Number
Other Number: 2005.58.61Dimensions
Width
4 inDepth
3 inLength
4 inDimension Notes
Dimension taken at widest pointsLocation
Location
Display Case
PW-12Room
Petrified Wood RoomBuilding
Crater Rock MuseumCategory
ExhibitMoved By
Jillian Mather KettleyDate
September 19, 2025Notes
Location added when performing inventory
