 In fact, it turns out it wasn't even 50,000. If you read carefully the original paper that Davidson and Wolgamist cited, the actual counted number was 29,100. And there are other papers that acknowledge that they often had to interpolate because they could not clearly distinguish the varves. So the true number of actual counted banding patterns was probably somewhere between maybe 15 and 25 or maybe 15 and 30,000.