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EARTH'S HISTORY 1 (dating and geological principles), FOSSILS,…
EARTH'S HISTORY 1
(dating and geological principles)
EARTH =
Life
(the only planet in the solar system)
livable area
of the Solar System,
distance from the Sun
which guarantees
temperature suitable
with the presence of
water in the liquid state
atmosphere
protect
living forms
from harmful radiations
and from the fall of
extra-terrestrial bodies
CHANGES IN: GEOSPHERE, HYDROSPHERE, ATMOSPHERE AND BIOSPHERE
analysis of the rocks
UNIFORMITARIANISM
gradual process over very long time span
CATASTROPHISM
over short periods of time
DATING TECHNIQUES
absolute dating
EARTH 4.5 billion years old
Radiometry
analysis
of each isotope
"half-life"
relative dating
Reading the
geological strata
PRINCIPLES OF GEOLOGY
uniformitarianism or actualism
(James Hutton and Charles Lyell)
Earth's history is made up of
gradual and uninterrupted transformations
stratigraphic overlap
layers
are deposited
on top of each othe
r and, in a sequence that has not undergone alterations
principle of
superimposition of strata
STRATIGRAPHIC CORRELATION
3 more items...
horizontality and continuity
most sediments form
horizontal and continuous layers
FOSSILS
principle of
cross-cutting relationships