Paleoenvironmental Reconstruction Flashcards
Benefit and drawback of using ocean sediment to predict past environments
Extend back billions of years but there is varied resolutions
Chironomids are used as proxies for
Temperature
Pollen is used as a proxy for
Vegetation
Dust is a proxy for
Aridity
What is the most dominant form of oxygen on the planet
16O
What is dendroclimatology
Looking at info from tree rings
What is the law of superposition
Older sediments on bottom, youngest on top
The Cambridge half life of radio carbon (14C) is how long
5730 +- 40 years
The total number of MIS identified in the quaternary now exceeds what
100
Oxygen isotopes can be used as a proxy for what
Precipitation
The earths axil tilt has been calculated as
23.44 degrees
Eccentricity refers to which planetary cycle
Changes in the shape of the earths orbit
One complete cycle of obliquity takes how long
41,000 years
How much higher were temperatures in the last interglacial relative to present
2 degrees Celsius
