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GEOL 101: Intro to Geology > Hawaiin Islands > Flashcards

Flashcards in Hawaiin Islands Deck (11)
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1

Origin and influence of earths mechanical ayers

Did

2

Hawaii sand and rock

Right out of the sea

3

Tallest mt on Planet in HI
TALLEST NOT HIGHEST

Did

4

What happens during Radioactive decay

Eco

5

Define parent isotope, daughter isotope, an shelf life

Eco

6

What happens during radioactive decay

Atoms can go through Alpha decay, Beta decay, or Electron capture. In Alpha decay, an alpha molecule (2protons and 2 nuetrons) are removed from the atom. In Beta decay, an electron is removed, converting a nuetron is into a proton. Electron capture is the opposite. An electron is absorbed by the nucleus converting a proton into a nuetron. Any of these processes converts a parent atom into a daughter atom.

7

Parent Isotope vs. Daughter Isotope

Parent Isotope is the original isotope. Daught isotope is an isotope whose number of protons or nuetrons have been altered--changing the atom

8

relative proportions

This is how scientists date rocks. As time goes by the amount of parent isotopes goes down and daughter isotopes go up. After about a dozen 1/2 lifes, its difficult to tell age. One half life occurs when half of the parent isotopes have become daughter isostopes.

9

Nonconformity

boundary between two different rock types

10

Angular Nonconformity

boundary between two different sequences of sedimentary rocks, one of which has been tilted on an angle by plate tectonics or local faults.

11

Disconformity

a gap of time between two sequences of sedimentary rocks.