They didn't have modern technology....copper is given away by it's green deposite in/on rock but if all you have is green fields how would you know what's under there?
2006-11-29 00:14:56 · 4 answers · asked by Anonymous in Science & Mathematics ➔ Earth Sciences & Geology
Core samples was the way for a long time.
The ancients depended on the cracks in the earth to bring such things to their attention. Coal was found this way. Its burning qualities was probably discovered when some ancient man built a fire in a cave/hollow with coal in it.
2006-11-29 00:23:22 · answer #1 · answered by Aggie80 5 · 1⤊ 0⤋
Lets supose you lived back in 200 bc or something along those lines.. Walking along a river bank, or through a field you noticed some crystal formations jutting up out of the ground, yet you have no idea they are called "Crystal Formations".. Amazed you picked up this new found object. But when you picked it up you uncover more. You started to dig. Soon other travelers come walking by. They asked what did you find?... You show them the unknown item. One in the crowd proclaims, He must have it and would give you "x" amount for it.. you sell the items to him. In-turn this starts a frenzy. Others want this item to, so your forced to dig deeper.
In other words.. most rocks, stones, and minerals can be found atop the ground some placed there over time, While others have been unearthed by winds, rain etc. So when there is one.. there is sure to be more just under the surface.
2006-11-29 04:09:35 · answer #2 · answered by Not Applicable 3 · 0⤊ 0⤋
I think by studying the surrounding rocks formation agent and eras or periods especially connect with sedimentary rocks formation suchas coal formed from dead plants and minerals such as iron, copper connect with Crystalline rocks and Gypsum, cement, petroleium connect wiyh sedimentary rocks etc.
2006-11-29 00:31:12 · answer #3 · answered by Berhane Gebreyesus Habtu 4 · 1⤊ 0⤋
how to know when is coal or not
2015-01-28 05:16:46 · answer #4 · answered by PROHALCA 1 · 0⤊ 0⤋