Caracterización geomorfológica de las dunas longitudinales del Istmo de Médanos, estado Falcón, Venezuela

Camacho, Ronna; Salazar, Sasha; González, Luis Felipe; Pacheco, Henry; Suárez, Carlos

doi:10.14350/rig.29870

Cited by 2 publications

(2 citation statements)

References 12 publications

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“…In this sense, wind and water have different densities that correlate with the grain selection of the load that can be transported, and sediments associated with water will therefore be less well selected than those in dunes. Negative skewness in the distribution of particle sizes is related to a preponderance of grains with a larger mean particle diameter (M) [27].…”

Section: Discussionmentioning

confidence: 99%

Characterization of sandy beaches of the Southern Caribbean of Costa Rica

Piedra-Castro¹,

Castillo-Chinchilla²,

Morales-Cerdas³

2021

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Coastal zones are highly dynamic environments that provide a range of ecosystem services. They are influenced by natural and anthropogenic factors, leading to increasingly drastic changes which have negative impacts on biological diversity and human communities. The present study characterizes the beaches of the Southern Caribbean of Costa Rica (SC-CR) to provide a baseline for marine-coastal management. Eight beaches of the SC-CR were studied, and 47 transects were defined in which the following information was obtained: beach width, scarp width and height, average particle size in dunes, plant species, and vegetation cover and height. Puerto Viejo and Vizcaya were determined to have the greatest average width, while Manzanillo and Gandoca had the smallest. In 25.24% of the sampled points there were signs of erosion. The width of the scarp varied from 3.90 m to 43.70 m and the height between 15 cm and 70 cm. The sand particles in 87.5% of the beaches were medium-sized. A total of 283 trees or shrubs from 11 families and 11 species were counted. In conclusion, the characterization of the SC-CR beaches allowed generating baseline information on the state of the physical and biological aspects of these ecosystems, as well as showing that these beaches are exposed to change. However, it is necessary to establish whether these are related to the dynamics of the beaches themselves or due to the interactions of elements such as sea level rise, thermal expansion and changes in current patterns due to climate change or global change.

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Section: Discussionmentioning

confidence: 99%

Characterization of sandy beaches of the Southern Caribbean of Costa Rica

Piedra-Castro¹,

Castillo-Chinchilla²,

Morales-Cerdas³

2021

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“…The MCNP displays a variety of landforms (Figure 3). The northeastern portion of the park on the isthmus is characterized by stabilized longitudinal and parabolic dunes (Camacho et al, 2011). We regard these sediments as former marine beach deposits accumulated during the postglacial transgression, which were uplifted and exposed to the wind by neotectonic processes that started approximately 3000 yr ago (Audemard et al, 1995; Audemard, 1996).…”

Section: Study Areamentioning

confidence: 99%

Earthen ridges in coastal sand dunes of the Caribbean coast, Venezuela: Anthropogenic or natural?

et al. 2020

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Earthen ridges that occur in the active Los Médanos de Coro dune fields of the Venezuelan Caribbean coast have been attributed either to anthropogenic or natural origins. Anthropogenic explanations have focused on their location, geometry, structure, and compaction, in the context of archaeological sites and artifacts throughout the dunes, to suggest an origin as causeways built by the extinct Caquetío people and/or their pre‐Hispanic ancestors. To assess this topic, geomorphic, physicochemical, and elemental analyses were carried out on the ridges and interdunal beaches and playas. The configuration, elevation, and composition of the ridges, along with three bulk sediment 14C dates that range 1900–3000 year BP, are here found to be most compatible with a natural origin as exhumed paleochannels. Past human occupants may, however, have used the features as causeways.

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Caracterización geomorfológica de las dunas longitudinales del Istmo de Médanos, estado Falcón, Venezuela

Cited by 2 publications

References 12 publications

Characterization of sandy beaches of the Southern Caribbean of Costa Rica

Characterization of sandy beaches of the Southern Caribbean of Costa Rica

Earthen ridges in coastal sand dunes of the Caribbean coast, Venezuela: Anthropogenic or natural?

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