Haskell Limestone
Open-knowledge reference entry
Haskell Limestone is a geological unit name originating in Kansas and used in adjoining states. The Pennsylvanian period unit was named by R.C. Moore for the Haskell Institute in the southeast of Lawrence, Kansas in 1931. The name has been applied to various beds within this range, and assigned as a member variously to the Lawrence Formation, Cass Formation, and Stranger Formation, and significant legacy literature exists for each classification. These three formations now comprise the Douglas Group.
In 2002, within the effort to improve the correlation of Missourian stage geology between the states of Missouri and Kansas, as well as Nebraska and Iowa, the Haskell was assigned in Kansas to the Cass Formation as its lowest member (on the basis of distinct changes in fossil species).
Distribution and outcrop
The Haskell Limestone is recognized in deep hydrocarbon well logs throughout most of the state of Kansas; the "hot shale" gamma ray log "kicks" associated with the Haskell unit make it an easily identifiable datum/marker bed. However, as a stage in the Pennsylvania-Permian marine embayment of Kansas (Midcontinent Basin), the unit extends only limited distances into Oklahoma, Colorado, Nebraska, Missouri, and Iowa.
The Haskell Limestone's outcrop extends from northeast Oklahoma through Douglas County, Kansas, continuing into the adjoining corners of Nebraska, Missouri, and Iowa.
Blue Jacket's Crossing
Proceeding west from Independence, Missouri, the Oregon Trail kept a distance south from the incised bluffs nearer the Kansas River. However, it was unavoidable to cross the Wakarusa River and gain the crest of the hogback ridge between the Wakarusa and Kansas Rivers.
The public source identifies “Haskell Limestone” as open-knowledge reference entry. This brief keeps that definition visible, then builds a research path around Haskell, Limestone and Open-knowledge.
Why this record matters
A short description can identify a subject without explaining its stakes. For “Haskell Limestone”, the useful work is to connect “open-knowledge reference entry” to the records capable of establishing context and consequence.
Vocabulary and entity names are the principal evidence signals here, because they determine the precision of every later search. The source revision retrieved here is dated Jul 9, 2025. The linked authority identifier is Q111949631. None of the 0 selected statements returned an explicit reference. The first chronological checks are 1931 and 2002.
Overview language is designed for orientation and should not be treated as a substitute for the evidence cited beneath it. The source lead contains qualifying language; that uncertainty should survive quotation, summary and reuse. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
How to read it
Use the entry as an orientation point, then follow its citations and revision history. Names, dates and institutional relationships should be checked against the original record.
- Subject orientation
- Search vocabulary
- Locating named sources
The closest primary source, responsible institution and strongest cited specialist reference.
Three-step research path
- Establish the record: confirm the title “Haskell Limestone”, its source revision and the description used here.
- Expand the search: follow Haskell Limestone primary sources, Haskell Limestone archive and Haskell research across catalogues and specialist indexes.
- Test the account: compare the strongest cited source with the responsible institution’s current record and note any disagreement.
Questions for further research
- Which source most directly establishes the central claim about “Haskell Limestone”?
- What terminology or title could unlock a more precise catalogue search?
- Which institution is responsible for the underlying evidence?
Search terms from this dossier
This entry incorporates text from “Haskell Limestone” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.