The Tertiary Formations of Porto Rico

Hubbard, Bela

doi:10.1126/science.51.1320.395

Cited by 8 publications

(8 citation statements)

References 2 publications

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“…The shelf along the south coast of Puerto Rico apparently is complicated by several large normal faults (Griscom, 1968). From 415 to 1685 m of section is known to be present along the north coast (Hubbard, 1920(Hubbard, , 1923H. A. Meyerhoff, 1933;Zapp and others, 1948;Gordon, 1960;Mitchell, 1960;Briggs, 1961;Berryhill, 1965;Nelson, 1966b), and from 655 to 1955 m along the south coast (Mitchell, 1960;Pessagno, 1963a).…”

Section: Puerto Ricomentioning

confidence: 99%

“…In Puerto Rico, the Oligocene (part of San Sebastián Formation) of the northern coastal plain reaches a maximum thickness of 300 to 312 m (Briggs, 1961), and consists of poorly consolidated conglomerate, sandstone, siltstone, claystone, calcareous claystone, sandy chalk, and some coal (Hubbard, 1920(Hubbard, , 1923Briggs, 1961;Monroe, 1966;Habib, 1968b;Tobisch and Turner, in press). Shallow-water and coastal-lagoon strata are common in outcrop, but samples from a test well closer to the present coast were studied by Briggs (1961) and Gordon (1961a) and contain numerous beds of pelagic facies.…”

Section: Stratigraphymentioning

confidence: 99%

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Paleogeography and Geological History of Greater Antilles

Khudoley

Meyerhoff²

1971

Geological Society of America Memoirs

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Section: Puerto Ricomentioning

confidence: 99%

Section: Stratigraphymentioning

confidence: 99%

Paleogeography and Geological History of Greater Antilles

Khudoley

Meyerhoff²

1971

Geological Society of America Memoirs

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“…Mean anatures range from 78Â° F along the south coast to 70Â° F in the moun-tempe tains. Recent accounts of the climatology and physiography of Puerto Rico are given (1968,1969), Pagney (1966), and Pico (1950Pico ( , 1963 ), Butterlin (1956), Hubbard (1920Hubbard ( , 1923, Maury (1929Maury ( ) ( (1933, Mitchell (1954), Zapp, ^ffl/. (1948), Kave (1956), and Mattson (1967).…”

Section: Pliocenementioning

confidence: 99%

Studies in Neotropical Paleobotany. I. The Oligocene Communities of Puerto Rico

Graham¹,

Jarzen²

1969

Annals of the Missouri Botanical Garden

149

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Studies are being made of plant microfossils from seven Tertiary formations in Mexico, Panama, and Puerto Rico. The Puerto Rican samples from the Oligocene San Sebastian Formation have yielded 165 morphological forms; 44 have been identified, and 1 5 of these have no previously known fossil record. Community types include a coastal, brackish-water assemblage of Rhizophora and Pclliciera, an upland tropical to subtropical community, and an arboreal cool-temperate community of Fagus, Liqziidamhar, and Nyssa. Of the 44 genera identified, 31 presently grow in Puerto Rico, three grow on other islands of the Antilles, seven are found in ecologically comparable habitats elsewhere in Latin America, and only the three temperate trees require habitats not presently available on the island. The temperate element suggests altitudes greater than those of today, and recently available geological data reveal the presence of Oligocene highlands of 13,000 to 15,000 feet elevation. These would be sufficient to provide cool-temperate conditions in an insular environment at 18 degrees north. Ancestral Puerto Rico (Hispaniola, Puerto Rico, and the Virgin Islands) provided an effective landbridge between northern South America, the West Indies, and Mexico (Yucatan). However, the Oligocene seas extended across at least part of peninsula Florida and up to 120 miles inland along the Texas Gulf Coast; thus the barrier to migration from the Antilles into southeastern North America was probal)ly greater than at present. Of the 44 genera identified all have affinities with northern South America, eastern Mexico, and the Antilles; and none have exclusive affinities with the vegetation of southeastern North America. Studies from Panama and Veracruz, Mexico, suggest tropical elements in the modern and fossil floras of southeastern North America were introduced along an Isthmian-coastal Mexico route during the early Tertiary or subsequently through long distant dispersal into tropical outliers (southern peninsula Florida).The tropics are generally recognized as an important center for biological diversity, and a number of studies are underway dealing with the systematies, ecology, and evolutionary aspects of tropical plant communities. The more recent ^ Based in part on a thesis (DMJ) submitted as partial fulfillment for the requirements of Masters of Arts degree, Kent State University.

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“…Aguada Limestone" (Zapp and others, 1948) is essentially the same section previously named "Los Puertos Limestone" by Hubbard (1920), although the type locality of the Aguada (Zapp and others, 1948) is within the Cibao outcrop. Monroe (1968) established a reference section for the Aguada Limestone to deal with this problem.…”

Section: Introductionmentioning

confidence: 91%