six laws of determining relative ages

Answer:

1. law of original horizontality
2. law of lateral continuity
3. law of superposition
4. law of inclusions
5.law of cross-cutting
6.law of unconformities

law of original horizontally

Answer:

- sedimentary layers(strata) and lava flows were originally deposited as relative horizontal sheets, like a layer cake

law of later continuity

Answer:

- lava flows and strata extend laterally in all directions until they thin to nothing or reach the edge of their basin of deposition

law of inclusions

Answer:

- any peice of rock(clast) that has become included in another rock or body of sediment must be older than the rock ro sediment into which it has been incorporated

law of cross-cutting

Answer:

- any feature that cuts across a rock or body of sediment must be younger than the rock or sediment that it cuts across

law of unconformities

Answer:

- surfaces called unconformities represent gaps in the geologic record that formed wherever layers were not deposited for a time or else layers were removed by erosion

300,000 years

Answer:

with a half life of 100,000 yearsif there are 20,000 to begin with, how long will will it take for there to be 2,500?

jurassic

Answer:

the paleozoic does not include include the

absolute

Answer:

radiometric age is often referred to as ___________ age.

the principal of original horizontality states that

Answer:

sediments are deposited as essentially horizontal layers