Relative dating of rocks activities

10-Jan-2020 05:25

You should already understand that the lower rock strata are generally older than the strata found higher up in the rock.

When a scientist finds a section of rock that has lots of different strata, he assumes that the bottom-most layer is the oldest, and the top-most layer is the youngest.

The site also provides fact sheets on the age of the Earth and isochron dating.

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Watch this video to find out how we use index fossils to establish the relative ages of rocks.By doing this, you will unravel the geologic history recorded in the rock record, just as geologists did hundreds of years ago, and still do today. An earlier current-formed ripple set (at bottom of slide) was later modified by a second ripple train migrating at right angles to the first.Crests of the first set are preserved in the troughs of the second set, hence, the ladderback appearance.But sometimes, a scientist finds a couple of rock outcrops that are separated by a wide distance.Geologists often need to know the age of material that they find.

Watch this video to find out how we use index fossils to establish the relative ages of rocks.By doing this, you will unravel the geologic history recorded in the rock record, just as geologists did hundreds of years ago, and still do today. An earlier current-formed ripple set (at bottom of slide) was later modified by a second ripple train migrating at right angles to the first.Crests of the first set are preserved in the troughs of the second set, hence, the ladderback appearance.But sometimes, a scientist finds a couple of rock outcrops that are separated by a wide distance.Geologists often need to know the age of material that they find.Before you begin this activity, read the book chapter listed below, which is available online through Library Reserves.