The Buffonta kimberlite dyke intruded Archean mafic volcanic rocks along a shear-hosted quartz vein approximately 155 to 160 Ma ago (L. Heaman, per comm., 1995). The dyke consists of kimberlite breccia with angular vein quartz and pyritized, gold-bearing felsic intrusive rocks in a kimberlite matrix. It has a minimum strike length of 300 m and is approximately 1 m wide where it subcrops. The upper 2 m of the pipe is severely weathered and can be excavated easily with a shovel. Till is thickest (3 m) directly over the dyke where the kimberlite has been differentially eroded 1 m below the surrounding bedrock. The relative abundance of indicator minerals in the dyke is Cr-diopside > pyrope > Mg-ilmenite > chromite. Kimberlite pebbles and indicator minerals have been dispersed a maximum of 6 m down-ice (south-southeast). Till geochemistry reflects the incorporation of kimberlite but the signature can only be traced 6 m down-ice, i.e. it is very local. Results from detailed sampling on the Buffonta property are described in GSC Open File 3007 (McClenaghan et al, 1995).