The guide was written by Executive Director Dr. Phil Stokes — a geologist — and Director of Education Dr. Holly Schreiber — a paleontologist — and provides a broad introduction to the history and science of Penn Dixie. Topics in the 18-page paper include:
Geological setting of New York State in the Devonian Period
Plate tectonics affecting the Catskill Basin and WNY
Why many different types of fossils are found at Penn Dixie
An overview of the main types of fossils found, including brachiopods, bryozoans, trilobites, crinoids, bivalves, gastropods, cephalopods, plants, and fish
Images of our fossils with updated nomenclature
A discussion of the fossil-bearing layers at Penn Dixie
Our organization’s history, and how we ended up as Penn Dixie!
While the Penn Dixie site is world renowned for its excellent trilobites, and perhaps even for its incredibly abundant corals, there are small, relatively underappreciated areas of the site which can offer unique and exciting treasures for those willing to take a closer look.
The site is broken up into several main areas which are frequented by our visitors. Among the most popular are our “trilobite beds” and the aptly-named “brachiopod pit”. Different areas of the site represent different exposures and layers of strata. While large portions of the 54-acre site are teeming with fossil horn corals, brachiopods, and trilobites, there are are other sections of the site which represent entirely different conditions.
During fossilization, there a process known as permineralization. During this process, empty spaces that were present in the living organisms are filled with groundwater, rich in minerals leached from the surrounding materials. This process can fill in very small spaces, even those within cell walls. Depending on the types of minerals present and the conditions during fossilization, this process can result in many interesting types of preservation. One of such types is known as pyritization.
Pyrite is an iron sulphide and is often lustrous and gold in color, giving cause for its common name, Fool’s Gold. Under rather specific circumstances it can coat or fill gaps during the fossilization process. Typically, in order for pyritization to occur, organisms must be deposited in seawater areas that are low in both organic matter, and dissolved oxygen. This oxygen-deficient water create what is known as an anaerobic environment. In this environment, certain bacteria are able to survive and flourish. When combined with reactive iron, these bacteria convert the sulphates into sulphides which results in a pyrite mineralization in the remains.
At the Penn Dixie site it is possible to uncover beautiful, golden pyritized specimens, however, the vast majority have exhibit a higher iron content and have weathered out and oxidized to present with a metallic rust colored finish. These fossils are generally rather small in size—averaging roughly 5mm in diameter—and tend only to appear in the site’s “Pyrite Beds.”
To the untrained eye, these diminutive fossils could easily be mistaken for pebbles or debris. Upon closer examination however, one can find many interesting examples of Devonian critters. Pyritized goniatites, gastropods, brachiopods, ambocaelia and even trilobites can be found with some effort.
While the “Pyrite Bed” at Penn Dixie represents a rather small and unassuming portion of the site, those willing to spend the time and effort to examine the surface closely can find a veritable treasure-trove of unique and interesting fossils. Don’t be fooled, all that glitters is not gold… sometimes it’s pyritized fossils!
Goniatites sp., possibly G. uniangularis
Clockwise from upper-left: Ambocaelia sp.; Greenops boothi; Goniatites sp., possibly G. uniangularis; Nuculites sp.; Loxonema sp.; and an unidentified brachiopod. Click fossils for larger images. All photos courtesy of Jay Wollin.
While Penn Dixie may be covered in ice and snow, we can always think ahead to the coming spring and summer months when the site will be visited by fossil collectors of all ages and experience levels. This spring, we’ve got Earth Day on April 22 and Dig with the Experts scheduled for Memorial Day weekend, plus many school field trips. In the summer we’ll host a full array of science and nature programs, but fall will be a really special time when we host our 20th Annual WNY Earth Science Day on Saturday October 7. To get in the sprit, take a look back at Earth Science Day 2016 — Saturday October 8 — with some photos courtesy of superstar volunteer Jake Burkett and his family.
For the full gallery visit the Google Drive gallery — thanks Burketts! We are grateful for the following organizations that made Earth Science Day possible:
3rd Rock LLC
Aquarium of Niagara
Animal Advocates of WNY
Buffalo Association of Professional Geologists
Buffalo Geological Society
Buffalo Museum of Science
Buffalo Niagara Riverkeeper
Canisius College Seismographic Station
Earth Dimensions, Inc.
Ecology & Environment, Inc.
Erie County Department of Environment and Planning
A newly released report from the Hamburg Natural History Society (HNHS) finds that the Penn Dixie Paleontological & Outdoor Education Center’s annual fossil dig — Dig with the Experts — contributed greater than $32,000 in total economic impact to the Hamburg area in 2016.
The report examined the economic benefits generated from the one-day fossil collecting program in which visitors were invited to collect fossils in a freshly excavated portion of the site’s 54-acre quarry. Paleontologists from the Cincinnati area supervised the dig, where participants could unearth 380 million-year-old rocks in search of marine fossils such as trilobites and brachiopods.
Visitors stayed in local lodgings, dined at local restaurants, and visited area attractions while they were in town. About 40 percent of the dig 165 attendees traveled from outside the Buffalo area; a similar number were first-time visitors to Penn Dixie.
HNHS Director David Hanewinckel, who authored the study, stated “We knew Penn Dixie had an economic effect on the area, but before this study, we didn’t know how much we contributed. Now, we have a good number and look forward to continuing success.” The study was conducted by Hanewinckel, HNHS Executive Director Phil Stokes, and Dr. Roger Levine, an independent consultant formerly of the American Institutes for Research.
Penn Dixie typically welcomes 12,000 visitors each year; visitors from 31 states and four countries have visited to date in 2016. Penn Dixie was recognized as the top fossil park in the U.S. following a 2011 study published by the Geological Society of America.