Petrified Wood

Object/Artifact

-

Crater Rock Museum

Name/Title

Petrified Wood

Entry/Object ID

06.58.36

Description

Assemblage Zone: nonmarine volcanic sedime Chemical Composition: Si O2 Crystal System: Hexagonal Description: Family: Not Identified Age: Late Eocene to Early Oligocene Location data: Colestin Formation, Dry Creek, Jackson County, Oregon USA Description: Roxy Ann wood, multi-color white, tan & clear, several holes throughout this piece with crystalline on the outer surface and holes, outer tan & rust. Fluoresces orange under shortwave ultraviolet light Type of Fossils Present: Plants Fracture: conchoidal Grain Size: Fine Hardness: 7 Quartz Lithofacies: volcaniclastic 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 Collection

Acquisition

Accession

06.58

Source or Donor

Petrified Wood Collection

Acquisition Method

Donation

Other Names and Numbers

Other Number

Other Number: 2006.58.36

Dimensions

Width

5 in

Depth

11 in

Length

10 in

Dimension Notes

Dimension taken at widest points

Location

Location

Shelf

3rd shelf rightside, 3rd shelf rightside

Wall

right - south

Room

Wood room

Building

Mentzer Hall - Petrified Wood Room - Case #100

Category

Permanent

Moved By

Catherine Boyd

Date

March 6, 2008

Location

Container

Left

Drawer

Bottom

Shelf

Left

Cabinet

Case #100

Wall

South wall

Building

Mentzer Hall - Petrified Wood Room - Case #100

Category

Permanent