Woodworthia

Object/Artifact

-

Crater Rock Museum

Name/Title

Woodworthia

Entry/Object ID

78.58.129

Description

Assemblage Zone: sedimentary Chemical Composition: Si O2 Crystal System: Hexagonal Description: Family: Protopinaceae Genus: Woodworthia Species: Arizonica Common name: Woodworthia Age: Late Triassic Location data: Chinle Formation, Milky Ranch in Arizona, USA Description: Delmar describes this pieces as 1/2" (1.2cm) thick slice of petrified wood , variety "Woodworthia" from east central Arizona. Tropical variety. Polished side shows an opaque center with jagged edge in beige, silver and brown wood, some red, surrounded by agatized wood in beiges with some pink and grey (with inclusions) at outer edge. Several cracks visible. Probably from Jurassic period (Mesozoic era) Size: 8.00"x 8.500"x .500" Type of Fossils Present: Plants Grain Size: Fine Hardness: 7 Quartz Lithofacies: Fluvial System 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

78.58

Source or Donor

Delmar Smith Petrified Wood Collection

Acquisition Method

Donation

Other Names and Numbers

Other Number

Other Number: 1978.58.129

Dimensions

Width

8-1/2 in

Depth

1/2 in

Length

8 in

Dimension Notes

Dimensions taken at widest points

Location

Location

Container

Center

Drawer

Top Shelf

Shelf

Right

Cabinet

Case #103

Wall

East Wall

Building

Mentzer Hall - Petrified Wood Room

Category

Permanent

Location

Shelf

2nd shelf on the lef, 2nd shelf on the lef

Wall

far right

Room

Main, Mentzer Hall

Building

Crater Rock Museum

Category

Permanent

Location

Shelf

top far right, top far right

Wall

Eastern

Room

Wood room

Building

Mentzer Hall - Petrified Wood Room

Category

Permanent