Spruce

Object/Artifact

-

Crater Rock Museum

Name/Title

Spruce

Entry/Object ID

05.58.188(a)

Description

Assemblage Zone: sedimentary Chemical Composition: Si O2 Crystal System: Hexagonal Description: Family: Pinaceae Genus: Picea Common Name: Spruce Age: Oligocene to Miocene Location Data: Hubbard Basin, Nevada Formation: Jarbridge Rhyolite Description: Thick slab with polished face. Multiple colors throughout in a non-conforming pattern. Colors are vivid, ranging from reds, browns, white, grey, tan,beige, black and burnt yellow. Type of Fossils Present: Plants Fracture: conchoidal Grain Size: Fine Hardness: 7 Quartz 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: Moderate Rock Color: Medium Rock Origin: Post-depositional Rock Type: Sedimentary Specific Gravity: 2.6 Surface Process: Not apparent Streak: white Temperature: Low Texture: microcrystalline Variety: Petrified wood is hydrous microcrystalline variety of quartz that can be defined in general term of chalcedony or opalization

Collection

Petrified Wood Collection

Acquisition

Accession

05.58

Source or Donor

Petrified Wood Collection

Acquisition Method

Donation

Other Names and Numbers

Other Number

Other Number: 05.58.188(a)

Dimensions

Width

9-1/2 in

Depth

3/8 in

Length

11 in

Dimension Notes

Dimension taken at widest points

Location

Location

Display Case

PW-4

Room

Petrified Wood Room

Building

Crater Rock Museum

Category

Exhibit

Moved By

Jillian Mather Kettley

Date

January 29, 2025

Notes

Added current location