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- 11Jones, Brian
- 2Hunter, Ian G.
- 1Alonso Zarza, Ana M.
- 1Alonso-Zarza. Ana M.
- 1Beanish, Jennifer
- 1Bixby, Rebecca J.
The Giggenbach submarine volcano, which forms part of the Kermadec active arc front, is located ∼780 km NNE of the North Island of New Zealand. Samples collected from chimneys associated with seafloor hydrothermal vents on this volcano, at a depth of 160–180 m, contain silicified microbes and...
We report on a reticulated filament found in modern and fossil cave samples that cannot be correlated to any known microorganism or organism part. These filaments were found in moist environments in five limestone caves (four in New Mexico, U.S.A., one in Tabasco, Mexico), and a basalt lava tube...
The rugged karst terrain developed on the dolostones of the Miocene Cayman Formation (Fm) on Grand Cayman includes numerous large cavities that formed through the activity of tree roots. The surfaces of those cavities are coated with laminated calcrete crusts up to 8 cm thick that are formed of...
The reflectance spectra of opal-A (05-22 µm) from the Taupo Volcanic Zone: spectra that may identify hydrothermal systems on planetary systemsDownload
Opal‐A, the main component of siliceous sinters in many terrestrial hydrothermal systems, is a hydrated silicate that commonly incorporates silicified microorganisms. The detection of opal‐A on the surface of Mars, therefore, may carry important implications in the search for extraterrestrial...
Dynamic carbonate sedimentation in a shallow coastal lagoon: Case study of South Sound, Grand Cayman, British West IndiesDownload
South Sound is a 3.4 km-, shallow (.: 2 m), funnel-shaped lagoon located on the southwest exposed windward margin of Grand Cayman. The composition and distribution of the Thalassia, Sand, Rock Bottom, Brown Algae, Rubble, and Coral Head facies, are controlled by the dynamic interplay between...
Frank Sound and Pease Bay are small narrow (~4 km long and <1 km wide) shallow water (1.5-2.0 m average depth) lagoons (< 0.5 m deep) located on the exposed-windward margin of south coast of Grand Cayman. Collectively, the Rubble and Knob, Bare Sand, and Thalassia and Sand zones form 95-97% of...
Desarrollo de calcretas en cavidades cársticas y/o de raíces: Las calcretes Cuaternarias de la Isla Gran Cayman (Calcrete development in root/karstic cavities: Quaternary calcretes from Grand Cayman)Download
The ruggest karst terrain that is developed on the dolostones of the Miocene Caayman Formation on Grand Cayman includes numerous large cavities that formed through the activity of tree roots. The surfaces of those cavities are coated with laminated calcrete crusts that are up to 8 cm thick. These...
Marine-planation terraces on the shelf around Grand Cayman: a result of stepped Holocene sea-level riseDownload
The shelf around Grand Cayman consists of two seaward-sloping terraces separated by a mid-shelf scarp . Except along the exposed windward margin where coral growth is dominant, the upper terrace (0-10 m bal) largely consists of a barren rocky pavement traversed by erosional furrows. Exposure...
Vermetid buildups, formed primarily of Dendropoma, are found in the coastal areas near Bodden Town and Great Bluff Estates on Grand Cayman. These gastropods are commonly encrusted by foraminifera (Homotrema rubum, Acervulina? sp.), coralline algae, and cyanobacteria. Spaces between the gastropods...
Two stretches of rocky coastline on Grand Cayman are characterized by boulders that are up to 5.5 m long, 3.4 m wide, and 2.3 m high (estimated to weigh as much as 40 tonnes). Clusters of boulders, which are irregularly distributed through the area, occur up to 100 m inland from the present-day...