Flashcards
Milankovitch Cyclicity + end of packet 3
Flashcards do conjunto (6)
- 1What is Milankovitch Cyclicity?The relationship between climate and earth's orbital variations.
Variations caused by Jupiter and Saturn - 2What is the eccentricity cycle?Change in the shape of Earth's orbit (circular to elliptical)
- 3What is obliquity cycle?Change in the angle of tilt of Earth
- 4What is precession cycle?Change in direction of tilt of Earth (ex. alternate between Vega and North star)
- 5How can Milankovitch Cyclicity affect sedimentation?Results in rhythmic bedding in certain depositional environments.
- 6What are some major sequences in North America?Regionally recognizable packages of sedimentary rocks bounded by major unconformities.
Megasequences of time are lost in middle america.