Name/Title
Petrified WoodEntry/Object ID
05.58.162Description
Assemblage Zone: sedimentary
Chemical Composition: Si O2
Crystal System: Hexagonal
Description: Family: Moraceae
Genus: Ficus
Common Name: Fig
Age: Mesozoic
Location Data: Texas
Description: Thick slab with polished face. Distinct black and beige"tiger stripe" pattern on outer areas of specimen. Inner area has visible growth rings in a light brown coloring with a black spot towards the center.
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 opalizationCollection
Petrified Wood CollectionAcquisition
Accession
05.58Source or Donor
Petrified Wood CollectionAcquisition Method
DonationOther Names and Numbers
Other Number
Other Number: 05.58.162Dimensions
Width
5-1/2 inDepth
3/4 inLength
11-1/2 inDimension Notes
Dimension taken at widest pointsLocation
Location
Container
LeftDrawer
Top ShelfShelf
RightCabinet
case #109Wall
West WallBuilding
Mentzer Hall - Petrified Wood RoomCategory
Permanent
