Name/Title
Large Tropical LeafEntry/Object ID
07.57.19Description
Leaf seed imprint on a beige sandstone(?).
Leaf fossils in this case are carbon films that remain on the bedding surfaces of fine-grained sediments. Fossilization happened after the leaves sank to the bottom of a pond or lake and were later buried by additional fine-grained sediments. With burial, the leaves were compressed and the sediment surrounding them solidified. Eventually these fine-grained sediments became sandstone, shale or mudstone. When all the volatile organic material in the living leaf was pressed out, only a thin carbon residue was left in the sediment, marking the outline and veins of the leaf.
[Original digital catalog entry by Catherine Boyd identified this as Craigia orgonensis, specifically a fruit leaf. I found that dubious, and have changed the entry accordingly. - Scott Kottkamp]
Rock and Mineral Data (Silica):
Assemblage Zone: sandstone
Chemical Composition: Si O2
Crystal System: Subhedral
Type of Fossils Present: Plants
Fracture: conchoidal
Grain Size: Fine
Hardness: 7 Quartz
Lithofacies: sedimentary
Luster: Silky
Pressure: Moderate
Rock Color: Dark
Rock Origin: Marine/Freshwater
Rock Type: Sedimentary
Specific Gravity: 2.6
Surface Process: Not apparent
Temperature: Low
Texture: fine grainCollection
Fossil CollectionAcquisition
Accession
07.57Source or Donor
Fossil CollectionAcquisition Method
DonationNotes
Donated by Doug Foster.
As of 5.18.2021, there is a duplicate catalog entry of the same specimen in the system. It uses the alternative 2007.57.19 notation.Other Names and Numbers
Other Number
Other Number: 2007.57.19Dimensions
Width
5-1/2 inDepth
2 inLength
8-1/4 inDimension Notes
Dimensions taken at widest pointsLocation
Location
Display Case
PW-7Room
Petrified Wood RoomBuilding
Crater Rock MuseumCategory
ExhibitMoved By
Jillian Mather KettleyDate
January 22, 2025Notes
Inventory/ location
