How old are the oldest rocks in the Black Hills of S Dakota and Wyoming?

Answer 1

Precambrian for the Black Hills. That's anything from 542 million years (the start of the Cambrian) and back. The Rockies in Wyoming are Paleozoic to Mesozoic in age. If you want to know specifics then contact the USGS in Wyoming because they would be the people who would know the right answer.

And for the record rocks aren't as old as the Earth because they are re-crystallized/partially melted to form new rocks. They are not the same rocks they were before and we pick up more sediments and minerals from cosmic bombardment.

Answer 2

The Neoarchean basement in the Black Hills is comprised of 2560-2600 Ma syntectonic granites and older gneisses according to the source below.

A little over 2 1/2 billion years.

A previous answer stated the Rockies in Wyoming are Paleozoic and Mesozoic. There are also Archean, Proterozoic and Cenozoic formations there. For instance, the Nash Formation in the Medicine Bow Range has yeilded dates from 1.9 billion years to 1.65 billion years B.P., and older formations crop out (mainly in the cores of the state’s several mountain ranges.)

Answer 3

Rain interior the Face became a member of the Hunkpapa Sioux Indians....he became born interior the early 1800s and during the age of 10 fought in a conflict throughout a heavy typhoon, streaking his facial warfare makeup for this reason the call.."rain interior the face" alongside with Sitting Bull and loopy Horse, they lead the biggest Indian united states to the conflict of Little massive Horn...Rain interior the face became accused of unquestionably killing Custer even even though it has by no ability been shown...if i remember wisely, Sitting Bull and Rain interior the Face escaped as much as Canada yet Rain interior the Face did later turn himself in...

Answer 4

How would it be possible for them to not be as old as the earth is? Unless aliens came and planted some "new" rocks, they'd have to be as old as the planet. Now some will argue that metamorphic rocks aren't as old as igneous, but the material forming those metamorphic rocks is just as old as the earth is.Sedimentary rock formations are constantly growing in some cases, just as metamorphic ones are in some cases, but all in all, the original material for those rocks is as old as the earth is.

Answer 5

The black hills (paha sapa) is sacred grounds that belonged to my people before yellow hair told the great white father that they were full of gold.They have always been there.

Answer 6

about 110 years old

Answer 7

i'd be surprised if anyone really knew, but you can safely say they probaly out date man

Answer 8

Real old.