ANTH 1001 4-3-08

ANTH 1001 4-3-08 - ANTH 1001 Paleontology General Issues I...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
ANTH 1001 -- 4/3/08 Paleontology: General Issues I. Nature of a fossil (What is a fossil) II. Geological time scale III. Dating techniques IV. Plate tectonics -- Already began dating techniques You’re dating the volcanic rock in association with the bones, not the actual fossils (fossils are somewhere between two dates provided by rocks- rocks above and below fossils) Half-life- amount of time for an element to lose ½ of it’s radioactivity -- Dating techniques: A. Potassium-Argon technique 40 K 40 Ar Half-life of 40 K is 1.25 billion years B. Carbon-14 14 N / 14 C Atmosphere: 14 C and 12 C (constant ratio in atmosphere) In our bones, we have this same ratio Half-life of 14 C is 5,730 years (only useful up to 40-70,000 yrs ago) Plate Tectonics: As plates slide (earthquake), collide (subduction- create mountains) 225 million years ago – Pangaea 135 million years ago—Northern and Southern landmass 90 million years ago—S. America and Africa separate
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Plate tectonics: 1) Position of landmasses is not static/constant. Plate tectonics affects climate, general ecology, and migration routes. 2) N. America and Europe were connected were connected to one another during the Paleocene and much of the Eocene. This connection helps explain geographical distribution among Eocene primates (and their similarity and anatomy). 3)
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 06/14/2009 for the course ANTH 1001 taught by Professor Tague during the Spring '07 term at LSU.

Page1 / 5

ANTH 1001 4-3-08 - ANTH 1001 Paleontology General Issues I...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online