Qodista ayaa dib loo bilaabay Walcott Quarry oo ay samaysay Geological Survey of Canada oo ay ku qancisay khabiirkii trilobite Harry Blackmore Whittington, waxaana la aasaasay dhagax cusub, Raymond, oo qiyaastii 20 mitir ka sareeya Fossil Ridge. Whittington, oo gacan ka helaya ardayda cilmi baarista Derek Briggs iyo Simon Conway Morris ee Jaamacadda Cambridge, waxay bilaabeen dib u qiimeyn buuxda oo ku saabsan Burgess Shale, waxayna shaaca ka qaadeen in xayawaanka la soo bandhigay ay aad uga kala duwan yihiin oo aan caadi ahayn intii Walcott uu aqoonsaday. Xaqiiqdii, xayawaanada badan ee la soo bandhigay waxay lahaayeen astaamo anatomical ah oo aan caadi ahayn oo kaliya u eg xayawaanada kale ee la yaqaan.
Dhagxaanta laga qodo ee Walcott