The mining company had applied to the Western Cape government for mining rights on some 500 000ha in the Karoo.
Uranium mining in the Karoo posed a serious threat to the environment, and extreme water consumption and severe dust pollution caused by uranium mining were of grave concern, he said in a statement.
The fact that the company missed the deadline could be construed as blatant disregard for the legal processes for mining rights applications, Cramer said, adding that it made a mockery of the public participation process prescribed by law and enshrined in the SA Constitution.