rock a has a pieces of rock b included inside it which is older how do i know this?
931139
if rock b is inside rock a then rock b has to be older becaue it would have been encompassed by whatever formed rock a.  Think of it this way also, if rock b was younger how would it get inside rock a?
1104836
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. \n\nAnd 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.
495467
http://www.acstones.com/gemofmonth/2001/gemofmonth.8.01.html
494583
A few years ago (1980s) a company was marketing a nuclear device for determining metal content of rocks.  This was a hand held device, and it worked very well.  I don't remember the manufacturer, but I know that it existed, and I saw it work.  The only problem was the nuclear source material.  In order to penetrate to any depth in the rock, it's nuclear source needed to be very powerful.  I think this was considered too much of a liability, and the company quit manufacturing the device.  I'm sure that you can still find one around.  I saw this demonstrated at a geologist's convention in Reno.  I think it was 1983 or 1984.
552288
rocks are made up of minerals
323011
depend on the type of rock. what material or materials is it made of, is it granite or what?
974922
rocks : see http://en.wikipedia.org/wiki/Rocks\nlakes : see http://en.wikipedia.org/wiki/Lakes
779667
The ages of rock strata are comparative in nature.  The law of superimpostion dictates that a rock included in a layer below another must be older.  Younger rocks are formed on top of older rocks.
191624
Archean/Archaean Eon (Precambrian Time) 3.8 billion years ago\n\nRocks older than this have been destroyed through plate subduction. The rocks were essentially recycled through melting.\n\nThe oldest rocks on earth are found in northernmost Canada (referred to as the Canadian Shield - have to check on the name; it's been a while) & Greenland.\n\nAustralia, too, has some of the oldest rocks. They also have fossils of one of the oldest lifeforms on earth, stromatolytes.
975135
One way to distinguish between intrusive and extrusive igneous rocks is to observe the crystal size.\nRocks formed below groung (intrusive) have must longer to cool, resulting in a larger crystal size.\nOn the other hand, rocks formed above ground (extrusive) have a much smaller crystal size
579735
Guess a group 3 metal such as boron or Aluminium
348469
Too long to list:\nhttp://seis.natsci.csulb.edu/bperry/ROCKS.htm\ngood site
315688
What is the difference between a rock and a stone? Had we been proceeding logically, this issue would have come first. Many will say there is no difference. But if we ask a geologist, the answer comes out pat: a stone is a rock that's been put to use: stone hammer, rip-rap, gravel, wall, paving stone, tombstone, milestone, statue. Now, a geopoet, I surmise, will give the same answer, but where the geologist snaps a lid shut, the geopoet opens Pandora's box. What happens between rock and stone is simply everything human, from the modifications necessary to make homes to, at the other extreme, the excesses of ownership and exploitation which submit all ends to ours. So another answer might be: rock is as old as earth is; stone is as old as the superfamily Hominoidae.\n\nWhat's the difference between rock and stone? In their natural setting, they're rocks; when we bring them into the garden, they're stones. Each has its own individual character.
830840
Sedimentary rocks ... As QFL 24-7 said you would be dating the formation of the rocks which formed the particles of the rock you are trying to determine its age .. so you will get an older age ...
548776
u've taken both the feathers nd the bricks as 1ton. the answer is in ur question only. both r 1ton tht is they r equal. the only difference v can make out is their quantity.
763702
Mostly quartz and orthoclase feldspar. Any number of other minerals can make up the rest.
860456
Rock can be either. For example, gold can be included in quartzite as discrete nuggets and therefore is heterogeneous but in shales and slates, lava, and even crystals, it is homogeneous. A heterogeneous material is a mixture of two or more things that are not bonded together and could be separated easily. A homogeneous substance is one where two or more elements are joined together in such a way that they are not easily separated. Think of this...sand and sugar...they are heterogeneous as we can dissolve the sugar and separate them easily, but with milk and coffee...they are homogeneous as it would be very difficult to divide the two.