AntarcticPilot
Well-known member
I didn't start Geology until University; so few people did Geology at school level that it was assumed that no one had. Only a large school would be in a position to teach it as a separate subject. This was at the time when Comprehensive Education was only just starting, so most undergraduates came from Grammar Schools, which were generally quite small - fewer than 100 students per year. I don't know what provision would have been made for colour blindness at University, but I presume some was - one of my crystalline state supervisors was colour-blind and had to keep reminding us not to colour code our diagrams! But colour blindness would be a serious handicap for anyone doing petrology; the ability to judge quite small changes in colour could be important. There were ways around some of them (I'm far too rusty to remember them), but the first quick look at a slide where the colours told you at a glance see what range of refractive indices was on display often gave you a quick insight into the nature of the rock. I remember spending many hours staring down a microscope looking at slides from the teaching collection!When I did my Geology O Level we had a colour blind test, and if you failed, which I did, you could ask for help in the thin section exam part, which basically meant the teacher told you what each mineral was. Very useful.