Xenolith-rich Masontown kimberlite

Description

Large sample of the Masontown kimberlite from Adah, southwest Pennsylvania; it is Jurassic in age. This sample contains numerous xenoliths and has an unusually thin alteration-rim around it. It was collected from a 20 cm-wide dike on the north slope of Middle Run (https://goo.gl/maps/LquWaCN25cXeYkg17). WVU petrology collection; collected by Graham Andrews, Brenna Cole (WVU), Ken Brown (DePauw), and Matt Brueseke (Kansas State). Photographed by Holly Pettus, and prepared and finished by Graham Andrews.