New Observations on the Origin of the Galapagos Islands, with Remarks on the Geological Age of the Pacific Ocean

During the study of the Carcinofauna of the Bahian Coast, some Brachyura Portunidae were found. Some of these animals were Callinectes arcuatus Ordway, 1863 which has its distribution restricted to the Pacific Ocean, from California to Peru and the Galapagos Islands. This is the first occurrence of this species reported from the Atlantic Ocean and the Brazilian Coast (Bahia, 38º50'Wand 12º50'S).

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Variability of Monthly Radiocarbon During the 1760S in Corals from the Galapagos Islands

Radiocarbon ◽

10.1017/s0033822200035670 ◽

2004 ◽

Vol 46 (2) ◽

pp. 627-631 ◽

Cited By ~ 19

Author(s):

Ellen R M Druffel ◽

Sheila Griffin ◽

Jeomshik Hwang ◽

Tomoko Komada ◽

Steven R Beaupre ◽

...

Keyword(s):

Mass Spectrometry ◽

Spectral Analysis ◽

Galapagos Islands ◽

University Of California ◽

Data Sets ◽

Galápagos Islands ◽

The Pacific ◽

The Pacific Ocean ◽

C Value ◽

The University

Radiocarbon (Δ14C) measurements of monthly samples from a Galapagos surface coral are among the first data sets from the new Keck Carbon Cycle Accelerator Mass Spectrometry laboratory at the University of California, Irvine. An average Δ14C value of −62 is obtained for 144 measurements of samples from monthly coral bands that lived from about AD 1760–1771 (±6 yr). High Δ14C values were found during January through March, when upwelling was weak or absent at the Galapagos Islands. Low Δ14C values were obtained mid-year during strong upwelling. The average seasonal variability of Δ14C was 15–25, which is greater than that at other tropical and subtropical locations in the Pacific Ocean because of intense seasonal upwelling at this site. Periods of sustained high Δ14C values were found during 1762–1763 and 1766. A spectral analysis revealed that the spectral density for the Δ14C data displays most of its variance at the 5-yr cycle, which is reflective of El Niño periodicity during the 20th century.

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XX. Letter from Captain Basil Hall, R. N. to Captain Kater, communicating the details of experiments made by him and Mr. Henry Foster, with an invariable pendulum; in London; at the Galapagos Islands in the Pacific Ocean, near the Equator; at San Blas de California on the N. W. Coast of Mexico; and at Rio de Janeiro in Brazil. With an appendix, containing the second series of experiments in London, on the return

Philosophical Transactions of the Royal Society of London ◽

10.1098/rstl.1823.0022 ◽

1823 ◽

Vol 113 ◽

pp. 211-285 ◽

Cited By ~ 2

Keyword(s):

Pacific Ocean ◽

Rio De Janeiro ◽

Thomas Hardy ◽

Scientific Research ◽

Galápagos Islands ◽

Useful Knowledge ◽

The Pacific ◽

The Pacific Ocean ◽

Series Of Experiments ◽

Commander In Chief

My Dear Sir, I herewith transmit the details of the experiments which have been made with the invariable pendulum, placed in my hands by the Board of Longitude, at your suggestion. It is matter of regret to me, that I should have visited so many remote places, with such means in my hands, and have so few results to produce. The fact however is, that the service upon which I was sent had no connection with scientific research, and that it was only at casual intervals of active professional employment, that I had any leisure for enquiries of this nature. These occasional opportunies I owe to the generous indulgence of Sir Thomas Hardy, the Commander in Chief, to whose assistance, also, and encouragement in every pursuit having useful knowledge for its object, I stand essentially indebted.

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