Militaries that have taken power in Africa's Sahel region—notably Mali, Burkina Faso and Niger—have put pressure on western ...

Around 10,000 years ago as the ice age advance began to melt, glacial deposits or drift were left behind. These glacial deposits were of two kinds: Till - mixed or unstratified materials directly ...

This paper deals with the occurrence of two boulders of bituminous sandstone which have been found in the glacial deposits of central Alberta. They occur mixed with other material that was carried ...