Persimmon

Object/Artifact

-

Crater Rock Museum

Name/Title

Persimmon

Entry/Object ID

07.58.69

Description

Assemblage Zone: sedimentary environments Chemical Composition: Si O2 Crystal System: Hexagonal Description: Genus: Diospyros-like Common name: Persimmon-like Age: Middle Eocene Location data: Wood Rock Creek in Currey County, Oregonm, USA Description: Small slab from Wood Rock Creek in Currey County on the Oregon coast. Size: 5.750"x 4.00"x .375" Type of Fossils Present: Plants Fracture: conchoidal Grain Size: Fine Hardness: 7 Quartz Lithofacies: Deltaic Complex sediments 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: 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: microcrystaline Variety: Petrified wood is hydrous microcrystalline variety of quartz that can be defined in general term of chalcedony

Collection

Petrified Wood Collection

Acquisition

Accession

07.58

Source or Donor

Petrified Wood Collection

Acquisition Method

Donation

Other Names and Numbers

Other Number

Other Number: 2007.58.69

Dimensions

Width

4 in

Depth

3/8 in

Length

5-3/4 in

Dimension Notes

Dimension taken at widest points

Location

Location

Container

Right

Drawer

Top Shelf

Shelf

Center

Cabinet

Case #105

Wall

North Wall

Building

Mentzer Hall - Petrified Wood Room

Category

Permanent