Petrified Wood

Object/Artifact

-

Crater Rock Museum

Name/Title

Petrified Wood

Entry/Object ID

07.58.35

Description

Assemblage Zone: sedimentary Chemical Composition: Si O2 Crystal System: Hexagonal Description: Family: Tiliaceae Genus: Tilia Common name: Basswood Age: Lower Oligocene Location data: Sweethome, Oregon. Mehama fm. Description: Thin slab with polished face. Multi-celled areas of brown and dark tan with some areas of translucent blue-grey. Size: 4.00"x 3.750"x .750" Type of Fossils Present: Plants Grain Size: Fine Hardness: 7 Quartz Lithofacies: flood basalts 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 Collection

Acquisition

Accession

07.58.

Other Names and Numbers

Other Number

Other Number: 07.58.35

Dimensions

Width

3-3/4 in

Depth

3/4 in

Length

4 in

Dimension Notes

Dimensions taken at widest points

Location

Location

Container

Right

Drawer

3rd Shelf

Shelf

Left

Cabinet

Case #108

Wall

North Wall

Building

Mentzer Hall - Petrified Wood Room

Category

Permanent