Yew (branch)

Object/Artifact

-

Crater Rock Museum

Name/Title

Yew (branch)

Entry/Object ID

07.58.15(a)

Description

Assemblage Zone: Sedimentary Chemical Composition: Si O2 Crystal System: Hexagonal Description: Family: Taxaceae Genus: Taxus Common name: Yew Age: Pliocene Location data: Bruno, Idaho Glenns Ferry Formation Description: A complete round branch with a 1.500" side branch. Many knots, green and tan outside with a tan and brown face. Size: 9.00"x 1.00"x .750" 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 Streak: white Temperature: Low Texture: Mircrocrystalline Variety: Petrified woods here are hydrous microcrystalline variety of quartz that can be generally termed as chalcedony.

Collection

Petrified Wood Collection

Other Names and Numbers

Other Number

Other Number: 07.58.15

Dimensions

Width

1 in

Depth

3/4 in

Length

9 in

Dimension Notes

Dimension taken at widest points

Location

Location

Container

Right

Drawer

2nd Shelf

Shelf

Center

Cabinet

Case #112

Wall

North Wall

Building

Mentzer Hall - Petrified Wood Room

Category

Permanent