Sequoia

Object/Artifact

-

Crater Rock Museum

Name/Title

Sequoia

Entry/Object ID

07.58.91

Description

Assemblage Zone: sedimentary Chemical Composition: Si O2 Crystal System: Hexagonal Description: Family: Taxodiaceae Genus: Sequoia-like Common Name: Sequoia-like Age:Eocene Location data: Dry Creek, Jackson County, Oregon, USA Description: Polished face shows colors grey, brown, tan, beige and some white agate, there are growth rings, you can see the grain. The outer side show a wood grain in a rusty tan color and some crystalization. Size: 3.500"x 5.250"x 2.500" Type of Fossils Present: Plants Fracture: conchoidal Grain Size: Fine Hardness: 7 Quartz Lithofacies: Nonmarine Luster: Glassy Occurrence: The Payne Cliff Formation is overlain by the nonmarine volcanic sediments of the Colestin Formation. The volcanic ash from the Colestin Formation vents covered an area from Lane County to the California board preserving the wood, leaves and pollen of thick forests of tropical to subttropical plants on the low coastal plain. Pressure: Moderate Rock Color: Medium Rock Origin: Post-depositional Rock Type: Sedimentary Specific Gravity: 2.6 Surface Process: Not apparent Streak: white Temperature: Low to moderate Texture: Mircrocrystalline Variety: Petrified woods here are hydrous microcrystalline variety of quartz that can be generally termed as chalcedony. 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.

Collection

Petrified Wood Collection

Acquisition

Accession

07.58

Source or Donor

Petrified Wood Collection

Acquisition Method

Donation

Other Names and Numbers

Other Number

Old Number: CRM/SOU DC-L-120; Other Number: 2007.58.91

Dimensions

Width

5-1/4 in

Depth

2-1/2 in

Length

3-1/2 in

Dimension Notes

Dimension taken at widest points

Location

Location

Display Case

PW-7

Room

Petrified Wood Room

Building

Crater Rock Museum

Category

Exhibit

Moved By

Jillian Mather Kettley

Date

January 22, 2025

Notes

Inventory/ location