Lithic Type Specimen: OJCU-5 (Ordovician Jefferson City-Cotter Undifferentiated, Variety 5)
date: label: Accession Date
content: 30 Aug 2012
label: Collection Date
content: 1970 to 1990
name: label: Collector
content: Don R. Dickson
label: Donor Name
content: Don R. Dickson
notes: label: Notes
content: OJCU-5 (Ordovician Jefferson City-Cotter Undifferentiated, Variety 5): Distribution: the Spavinaw area of NE Oklahoma and the Bever Lake area of northwest Arkansas. Linear to curved streaks of light, medium, and dark gray form the field. Viewed at 20X one can see that the texture of the darker areas is coarser than is that of the lighter streaks. This creates an irregular fracture in knapping. Old fractures (often healed) are common in this variety and vugs are rare. Probably this variety is mostly Cotter. Workability: fair.
label: Notes
content: JEFFERSON CITY. The Jefferson City formation is found on the surface throughout the southern half of Missouri, except in the extreme southeast and in the western counties (except McDonald & Barry, where limited amounts occurr). Over much of this area the Jefferson City and Cotter are not differentiated because the lithiologies are similar and often thin. In many cases the mottled and irregularly banded Jefferson City dolomite cannot be separated from from similarly marked Cotter. A careful microscopic examination reveals few distinguishing differences, so these are best left undifferentiated. The following two varieties seem to be clearly associated with the Jefferson City formation.
label: Notes
content: Jefferson City-Cotter
label: Record Last Modified
content: 22 Jun 2022
label: Specimen Count
content: 1
place: label: Place
content: Carroll Country, Arkansas, 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: 2060436
label: USNM Number
content: A587209-0
objectType: label: Object Type
content: Stone