11 February 2005
Road Cut Fossils

Forrest M. Mims III

Road cuts are an important source of many kinds of fossils. Shown here is one of many large cuts made along Interstate Highway 10 west of Kerrville, Texas.

These cuts are through Cretaceous limestone that contains countless non-vertebrate fossils, such as those shown in the inset. It's not uncommon to find ammonites 25 cm across lying on the surface at some sites.

Laws, rules and regulations that govern the collection of fossils from public roadways and road cuts vary, so it's always important to check before taking specimens. Collecting must never be done on private land without prior permission. Collecting is prohibited at State and National Parks.

Safety is also an important consideration, especially when collecting at the base of a high road cut like the one shown here or along a busy highway. I am unaware of any rules that prohibit taking photographs of specimens.

The novice fossil collector would be well advised to become familiar with basic procedures before beginning to collect specimens. Expert advice can be found by searching on "fossil collecting" on the web. There are a number of excellent articles about fossils on The Amateur Scientist 2.0 CD-ROM available from the Society for Amateur Scientists.

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One of many road cuts through fossil-rich limestone on Interstate 10 in Texas. The inset shows a representative selection of the countless fossils visible in this cut.
Click image to enlarge.
   
Copyright 2005 by Society for Amateur Scientists