Show Freaks and Oddities In Science N News BH J The name Brazil usually conjures up a U cal picture with jungles full of palms and rubber rubber rub rub- ber trees or great coffee coHee plantations Yet there was a time when the great southern land groaned under the burden of great continental ice sheets like those that plowed northern North America and Europe Only the Brazilian ice sheets came much longer ago between the coal age and the time of the dinosaurs There were at least five gre great t advances ances and retreats of the ice during the period Between the deposits left by the glaciers there here are arves or layered clay beds which can be counted upon b by seasons like the annual growth rings growth rings in trees These arves indicated Interglacial interglacial interglacial inter- inter glacial periods of ot at least some hundreds of thousands thousands thou thou- sands of years |