Submission Type
Poster
Abstract
Three conodont bearing samples from Mount Morris, New York, San Saba, Texas, and Pi, Spain were processed using 10% formic acid buffered with calcium carbonate and calcium phosphate to compare age, preservation, and burial depth as indicated by the Color Alteration Index. The Shurtleff Concretion Horizon in the upper Cashaqua Formation of the Sonyea Group from Mount Morris, New York, yielded a fauna of exceptionally well preserved Frasnian conodonts that are CAI 2.5. Pi-01 limestone from Pi, Spain, within the Barousse Formation yielded poorly preserved Upper Famennian conodonts that are CAI 5. Type Chappel limestone from San Saba, Texas, yielded a mixed fauna of well preserved Famennian and Tournaisian/Visean conodonts that are CAI 1-2. The range of color for the Type Chappel sample indicates that the temperatures ranged from 50°-140° Celsius. This shows it was buried in the mid continent where it was not affected by Orogenic events. This sample was made up of eroded layers of conodonts causing a mix of layers from the accumulation of conodonts. While the Pi-01 reached temperatures of 300°-480° C which was buried the most with the highest heat and pressure due to being directly on the Alpine orogenic belt. The Shurtleff Concretion Horizon reached temperatures ranging from 60°-200° C indicating that the strata were buried at an intermediate depth. This sample would have been found along the border of the Appalachian Orogeny.
Recommended Citation
Gilfus, Ethan; McCarthy, Jamie; and Britt, Ryan, "223 - Color Alteration of Conodonts from the Upper Devonian to Lower Mississippian" (2025). GREAT Day Posters. 66.
https://knightscholar.geneseo.edu/great-day-symposium/great-day-2025/posters-2025/66
223 - Color Alteration of Conodonts from the Upper Devonian to Lower Mississippian
Three conodont bearing samples from Mount Morris, New York, San Saba, Texas, and Pi, Spain were processed using 10% formic acid buffered with calcium carbonate and calcium phosphate to compare age, preservation, and burial depth as indicated by the Color Alteration Index. The Shurtleff Concretion Horizon in the upper Cashaqua Formation of the Sonyea Group from Mount Morris, New York, yielded a fauna of exceptionally well preserved Frasnian conodonts that are CAI 2.5. Pi-01 limestone from Pi, Spain, within the Barousse Formation yielded poorly preserved Upper Famennian conodonts that are CAI 5. Type Chappel limestone from San Saba, Texas, yielded a mixed fauna of well preserved Famennian and Tournaisian/Visean conodonts that are CAI 1-2. The range of color for the Type Chappel sample indicates that the temperatures ranged from 50°-140° Celsius. This shows it was buried in the mid continent where it was not affected by Orogenic events. This sample was made up of eroded layers of conodonts causing a mix of layers from the accumulation of conodonts. While the Pi-01 reached temperatures of 300°-480° C which was buried the most with the highest heat and pressure due to being directly on the Alpine orogenic belt. The Shurtleff Concretion Horizon reached temperatures ranging from 60°-200° C indicating that the strata were buried at an intermediate depth. This sample would have been found along the border of the Appalachian Orogeny.
Comments
Sponsored by D. Jeffrey Over