Resources Educational Materials Rohrer’s Quarry fact sheet (PDF) How to start a rock collection (PDF) Mineral identification guide (PDF) Tours Stay tuned for future tours Please note: We are currently experiencing some internal changes and cannot schedule new tours at this time. Please use this page to check for updates. We look forward to having visitors again soon! Resources North Museum of Natural History & Science in Lancaster, PA Jones Geological Services in York, PA PA Legislature — Locate and track current state mine & trucking legislation Pennsylvania Topographic and Geologic Survey Chemfinder — Find CAS numbers and other information on chemicals Michigan Mine Safety — Mine safety training materials and clip art
