Related Experiment Video
Updated: Jul 12, 2026
06:55
Kinematic History of a Salient-recess Junction Explored through a Combined Approach of Field Data and Analog Sandbox Modeling
Published on: August 5, 2016
Kope Formation (Upper Ordovician): Ohio and Kentucky
Science (New York, N.Y.)
|September 18, 1964
Summary
New geological strata near Maysville, Kentucky, are proposed as the Kope formation. This new designation avoids the term Eden due to its stadial meaning, clarifying rock unit correlations.
Area of Science:
- Geology
- Stratigraphy
- Paleontology
Background:
- Strata near Maysville, Kentucky, exhibit similarities to the Eden and lower Fairview formations of Cincinnati.
- The term "Eden" carries stadial connotations, necessitating a revised nomenclature for clarity.
Purpose of the Study:
- To propose a new geological formation name for strata near Maysville, Kentucky.
- To establish clear stratigraphic correlations and avoid ambiguous terminology.
Main Methods:
- Stratigraphic analysis of rock units near Maysville, Kentucky.
- Definition of the Kope formation based on lithology and stratigraphic position.
Main Results:
- The proposed Kope formation consists of medium-bedded limy shales with a mean clastic ratio of 2.5 to 3.8.
- These shales conformably overlie shaly Point Pleasant limestones (mean clastic ratio, 1.0) and underlie unnamed shaly limestones (mean clastic ratio, 0.5).
Conclusions:
- The Kope formation provides a distinct and unambiguous designation for these rock units.
- This redefinition facilitates more precise geological correlations in the Maysville-Cincinnati region.
Related Concept Videos
01:31Formation of Species
Speciation describes the formation of one or more new species from one or sometimes multiple original species. The resulting species are discrete from the parent species, and barriers to reproduction will typically exist. There are two primary mechanisms, speciation with and without geographic isolation—allopatric and sympatric speciation, respectively.Allopatric SpeciationIn allopatric speciation, gene flow between two populations of the same species is prevented by a geographic barrier, like...
01:33Cleavage and Blastulation
After a large-single-celled zygote is produced via fertilization, the process of cleavage occurs while zygotes travel through the uterine tube. Cleavage is a mitotic cell division that does not result in growth. With each round of successive cell division, daughter cells get increasingly smaller.
01:24Bone Formation by Endochondral Ossification
Bone formation, or ossification, begins around the sixth to seventh week of embryonic development. Most bones develop from a cartilaginous template through the process of endochondral ossification. Cartilage formation begins when clusters of mesenchymal cells differentiate into chondrocytes. These chondrocytes proliferate rapidly and secrete an extracellular matrix that becomes encased in a membrane called the perichondrium. The resulting cartilage model provides a template that resembles the...
01:11Formation of Higher-order Actin Filaments
The polymerization of G-actin monomers into filamentous F-actin is a multi-step process. Once the F-actins are formed, they can bundle together in different arrangements to form higher-order networks and regulate cellular functions. Common examples include the formation of lamellipodia and filopodia at the cell's leading edge by actin reorganization in a migrating cell. The microvilli on the brush border epithelial cells are also formed through the F-actin network.
The high-order actin networks...
The high-order actin networks...
02:56The Fossil Record
The fossil record documents only a small fraction of all organisms that have ever inhabited Earth. Fossilization is a rare process, and most organisms never become fossils. Moreover, the fossil record only exhibits fossils that have been discovered. Nevertheless, sedimentary rock fossils of long-lived, abundant, hard-bodied organisms dominate the fossil record. These fossils offer valuable information, such as an organism's physical form, behavior, and age. Studying the fossil record helps...
01:29Bone Formation by Intramembranous Ossification
Intramembranous ossification is one of the two processes involved in the development of bones within an embryo. The flat bones of the face, most of the cranial bones, and the clavicles are formed via this process. During intramembranous ossification, the bones develop directly from sheets of undifferentiated mesenchymal connective tissue.
The process begins when mesenchymal cells in the embryonic skeleton gather together and differentiate into osteogenic cells, which then develop into...
The process begins when mesenchymal cells in the embryonic skeleton gather together and differentiate into osteogenic cells, which then develop into...