Extreme gravity: Geologic effects

2020 ◽  
Vol 39 (6) ◽  
pp. 430-433
Author(s):  
John Milsom
Keyword(s):  
Pacific Ocean ◽  
Gravity Field ◽  
Combined Effect ◽  
Bouguer Gravity ◽  
Isostatic Compensation ◽  
Earth’S Gravity Field ◽  
Colombian Andes ◽  
The Pacific ◽  
The Pacific Ocean

The maximum positive combined effect on the earth's gravity field of all geologic sources present in a given area, including any isostatic compensation, is limited by the ability of the lithosphere to support load. Bouguer gravity is one possible proxy for this effect. Bouguer maxima close to +350 mGal have been measured on Chichijima Island and Penrhyn Atoll in the Pacific Ocean. These may be the highest values anywhere on the planet. Suggestions of even higher values in the northernmost segment of the Colombian Andes rely on extrapolation of trends established in areas surrounding the Santa Marta Massif and must be treated with caution.

On the Pacific Ocean regime shift

2001 ◽  
Vol 28 (19) ◽  
pp. 3721-3724
Author(s):  
Cathy Stephens
Keyword(s):  
Pacific Ocean ◽  
Regime Shift ◽  
The Pacific ◽  
The Pacific Ocean

Petrels collected by Titian Ramsay Peale in the Pacific Ocean during the United States Exploring Expedition of 1838–1842

2008 ◽  
Vol 35 (1) ◽  
pp. 143-149 ◽  
Author(s):  
W. R. P. BOURNE
Keyword(s):  
United States ◽  
Pacific Ocean ◽  
The United States ◽  
Important Type ◽  
The Pacific ◽  
The Pacific Ocean

The report by Titian Ramsay Peale on birds encountered during the Wilkes Expedition was withdrawn for inaccuracy when few copies had been distributed, and re-written by John Cassin. A survey of the accounts of the petrels shows that this was not an improvement. Two important type localities for Procellaria brevipes and Thalassidroma lineata are probably wrong, and could be exchanged.

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