Yew

Object/Artifact

-

Crater Rock Museum

Name/Title

Yew

Entry/Object ID

07.58.83

Description

Assemblage Zone: Sedimentary Chemical Composition: Si O2 Crystal System: Hexagonal Description: Family: Taxaceae Genus:Taxus Common Name: Yew Location Data: French Glen, Oregon Description: Rough outer area with a pink granular structure. The cut and polished face has a chambered yellow outer band with a tan and brownish-red inner area. Size: 3.500"x 3.500"x 6.500" Size: 7.00"x 4.00"x 4.00" Type of Fossils Present: Plants Fracture: conchoidal Grain Size: Fine Hardness: 7 Quartz 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: Medium 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

07.58

Source or Donor

Petrified Wood Collection

Acquisition Method

Donation

Other Names and Numbers

Other Number

Other Number: 07.58.83

Dimensions

Width

3-1/2 in

Depth

6-1/2 in

Length

3-1/2 in

Dimension Notes

Dimension taken at widest points

Location

Location

Container

Left

Drawer

Top Shelf

Shelf

Left

Cabinet

Case #111

Wall

South wall

Building

Mentzer Hall - Petrified Wood Room

Category

Permanent