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Phrases starting with the letter: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

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Definition of: geoid

(jēoid) noun
The earth considered as an ellipsoidal solid whose surface coincides with the mean level of the ocean. [<Gk. geoidēs earthlike < earth + eidos form]

GEOLOGICAL TIME SCALE
Read from bottom to top.
ERASTIME PERIODS ROCK SYSTEMSTIME EPOCHS ROCK SERIESAPPROX. DURATION MILLION YEARSAPPROX. PERCENT TOTAL AGELIFE FORMS
CENOZOICQUATERNARYRECENT PLEISTOCENE1Rise and dominance of Man.
UPPER TERTIARYPLIOCENE MIOCENE2Modern animals and plants.
65
LOWER TERTIARYOLIGOCENE EOCENE PALEOCENERapid development of modern mammals, insects, and plants.
MESOZOICUPPER CRETACEOUSPrimitive mammals; last dinosaurs; last ammonites.
75
LOWER CRETACEOUSRise of flowering plants.
JURASSIC455First birds, first mammals. Diversification of reptiles; climax of ammonites; coniferous trees.
TRIASSIC45Rise of dinosaurs; cycadlike plants; bony fishes.
PALEOZOICPERMIAN45Rise of reptiles. Modern insects. Last of many plant and animal groups.
PENNSYLVANIANimageFirst reptiles. Amphibians; primitive insects; seed ferns; primitive conifers.
CARBONIFEROUS75
MLSSISSIPPIANRBRACEClimax of shell–crushing sharks. Primitive ammonites.
9
DEVONIAN50First amphibians, first land snails. Primitive land plants. Climax of brachiopods.
SILURIAN20First traces of land life. Scorpions. First lungfishes. Widespread coral reefs.
ORDOVICIAN70First fish. Climax of trilobites. First appearance of many marine invertebrates.
CAMBRIAN50First marine invertebrates, including trilobites.
PROTEROZOICRBRACEFirst signs of life. Algae.
PRE-CAMBRIANAbout 3,00084
ARCHEOZOICimage
Age of oldest dated rocks: about 3,500,000,000 years.

Most often used phrases:

reference geoid
gutsy geoid
geoid height
geoid determination
geoid guard
geoid computation
geoid glacier
geoid surface
earth s geoid
rotating geoid
earth geoid
gravimetric geoid
geoid heights
geoid undulations
precise geoid

'geoid' used in domains:

thegeoid.com
geoidapp.com
geoide.com
webgeoid.com
egeoid.com
geoidiswilsoncolombia.com

Phrases starting with the letter: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

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