A 400-foot thick iron layer was found 1,750 feet beneath the surface and it stretches over an area of 6-10 square kilometres, said GSB Deputy Director Mohammad Masum.
@Nilgiri, answer to your post is above in the opening post by @Homo Sapiens. Read, it is 400 ft or about 122 meters thick. Why do you think it is not so without giving us any link to that. However, I agree that the thickness may not be uniform 400 ft. This is why a more elaborate survey is needed.LOL so you honestly think a test depth claimed 400 foot seam would