Knife River Flint Chert (Silicifed Sphagnum/Lignite?)
date: label: Accession Date
content: 29 Dec 2016
label: Collection Date
content: 29 Jul 1985
name: label: Collector
content: Jack Holland
label: Donor Name
content: Estate Of John D. Holland
notes: label: Notes
content: L-1720 (Knife River Flint Chert): Provenience includes gravel deposits. Not a collection from archaeological context. Collection includes raw material, outer surface, and naturally-weathered specimens.
label: Notes
content: L-1720 (Knife River Flint Chert):
label: Notes
content: Knife River Flint, also known as Golden Valley, is a chert or silicified lignite. It is root beer, tea, coffee, or caramel brown in color. When weathered it becomes a white patina. When heat-treated to 225-250 degrees C it darkens to a very dark brown to very dark gray. May have sphagnum inclusions or dark inclusions of a hazy tone reputed to be the lignite replaced by silica. It lacks the fibrous micro structure of chalcedony. It has a glossy texture that becomes a waxy luster when heat-treated. Deposits include tabular deposits in glacial deposits frequently found in gravel.
label: Notes
content: Geology remarks: Epoch- Eocene, Form- Golden Valley
label: Notes
content: Location remarks: Dunn & Mercer counties, North Dakota; Occurs as small pieces in glacial till as far east as central Iowa.
label: Notes
content: Archaeology remarks: Used during all cultural periods
label: Record Last Modified
content: 22 Nov 2019
label: Specimen Count
content: 9
place: label: Place
content: Dunn County, North Dakota, United States, North America
topic: label: Topic
content: Archaeology
setName: label: See more items in
content: Anthropology
dataSource: label: Data Source
content: NMNH - Anthropology Dept.
identifier: label: Accession Number
content: 2071475
label: USNM Number
content: A599022-0
objectType: label: Object Type
content: Stone