Seismology and Tectonics

1991 ◽  
Vol 7 (2_suppl) ◽  
pp. 15-33 ◽  
Author(s):  
Klaus H. Jacob ◽  
Javier Pacheco ◽  
Guillermo Santana ◽  
Elizabeth Arscott
Keyword(s):  
Costa Rica ◽  
East Coast ◽  
Focal Depth ◽  
Thrust Fault ◽  
Fault Rupture ◽  
Lower Block ◽  
Westerly Direction ◽  
Cordillera De Talamanca

The earthquake of April 22, 1991 was located in the eastern foothills of the Cordillera de Talamanca in Valle de la Estrella with epicentral coordinates of 9°38.62′N and 84°5.92″W and a focal depth of 21.5 km (Figure 2-1). An analysis of the seismograms recorded at teleseismic distances indicates that the causative fault was a shallow-angle thrust fault striking in a southeast-northwest direction and dipping at less that 30° gently towards the southwest. The lower block moved in a westerly direction while uplifting the upper-block east coast of Costa Rica by 1 to 1.5 meters. The plane of this fault rupture may either have reached the surface some distance offshore, or, possibly, failed to reach the surface. Aftershock data are consistent with this interpretation.

Paleosol evidence for Quaternary uplift and for climate and ecosystem changes in the Cordillera de Talamanca, Costa Rica

2007 ◽  
Vol 248 (1-2) ◽  
pp. 1-23 ◽  
Author(s):  
Steven G. Driese ◽  
Kenneth H. Orvis ◽  
Sally P. Horn ◽  
Zheng-Hua Li ◽  
Debra S. Jennings
Keyword(s):  
Costa Rica ◽  
Ecosystem Changes ◽  
Cordillera De Talamanca

New species of Calathea (Marantaceae) endemic to Costa Rica

1997 ◽  
Vol 75 (8) ◽  
pp. 1356-1362 ◽  
Author(s):  
Helen Kennedy
Keyword(s):  
New Species ◽  
Costa Rica ◽  
Key Words ◽  
Osa Peninsula ◽  
The Pacific ◽  
Pacific Slope ◽  
Cordillera De Talamanca

Calathea hylaeanthoides Kennedy, Calathea retroflexa Kennedy, and Calathea incompta Kennedy are described as new. All three species are endemic to Costa Rica. Calathea hylaeanthoides and C. incompta are from the Osa Peninsula, while C. retroflexa is from midelevation on the Pacific slope of the Cordillera de Talamanca. Calathea hylaeanthoides belongs to Calathea section Breviscapus, C. retroflexa belongs to Calathea section Calathea, and C. incompta belongs to the "Ornata group" of Calathea. Key words: Marantaceae, Calathea, Costa Rica, endemism.

scholarly journals Lista de la flora vascular de la cuenca superior del Río Savegre, San Gerardo de Dota, Costa Rica

2000 ◽  
pp. 1 ◽  
Author(s):  
Maarten Kappelle ◽  
Liz Van Omme ◽  
Marta E. Juárez
Keyword(s):  
Costa Rica ◽  
Del Rio ◽  
Cordillera De Talamanca

Este artículo presenta la lista de las especies de plantas vasculares encontradas en la cuenca superior del Río Savegre (2 000-3 491 m s.n.m.), San Gerardo de Dota, Reserva Forestal Los Santos, Cordillera de Talamanca, Costa Rica. Se muestreó la vegetación alpina del páramo, los bosques enanos subalpinos, los bosques maduros montano-altos y montano-bajos, como también las comunidades vegetales bajo influencia del hombre: los potreros, los helechales, los matorrales, los bosques secundarios y las plantaciones.  Se identificó un total de 626 especies en 121 familias; de ellas 123 pertenecen a las pteridófitas, 1 a coníferas, 385 a dicotiledóneas y 117 a monocotiledóneas. Las familias más diversas son Asteraceae (57 especies), Orchidaceae (51), Rubiaceae (26), Elaphoglossaceae (23), Polypodiaceae (23) y Poaceae (19), mientras que los géneros más ricos en especies son Elaphoglossum (23 especies), Polypodium (14), Epidendrum (12), Peperomia (12), Asplenium (9), Blechnum (9) y Ocotea (9). Las hierbas (incluyendo helechos y otras pteridófitas herbáceas) comprenden 56.2% del total encontrado (352 especies), mientras que los árboles, los arbustos y los trepadores contribuyen con 22.4% (140 especies), 15.3% (96) y 6.1% (38), respectivamente. Del total, 19.5% (122 especies) corresponde a epífitas. Cuatro especies (una asterácea y una laurácea recién descritas, así como una asterácea y una ciperácea inéditas) son nuevas para la ciencia. Los bosques maduros montano-altos y bajos, y los bosques secundarios montano-altos son las comunidades vegetales más ricas, con 264, 267 y 227 especies de plantas vasculares, respectivamente. La diversidad de los últimos se debe a la presencia de numerosos componentes herbáceos de la vegetación del páramo y del bosque enano subalpino, especies que pueden migrar hacia elevaciones menores después de la tala del bosque maduro montano-alto. La gran diversidad de los bosques maduros montano-bajos está relacionada con la existencia de elementos de la flora vascular que tienen su óptimo a altitudes menores de 2 000 m y que alcanzan el límite superior de su distribución precisamente en este tipo de vegetación.

scholarly journals A new species of anole Lizard, genus Norops (Squamata: Polychrotidae), from the Cordillera de Talamanca, Costa Rica

2015 ◽  
pp. 805-809
Author(s):  
Jay M Savage ◽  
Craig Guyer
Keyword(s):  
New Species ◽  
Costa Rica ◽  
Anole Lizard ◽  
Especie Nueva ◽  
Cordillera De Talamanca ◽  
A New Species

Se describe una especie nueva de lagartija del grupo de Norops fuscoauratus de Talamanca, Costa Rica. Difiere de las especies emparentadas de Costa Rica (Norops attae) y Panamá (Norops exsul, N. fortunensis y N. kemptoni) básicamente porque una estructura masculina ("dewlap") se extiende hasta el nivel de la axila y por ser rosado con un margen exterior anaranjado. También tiene patas más largas que N. fortunensis y N. kemptoni; difiere de este último y de N. attae y N. exsut en que tiene 2-4 filas ligeramente agrandadas de escamas medio-dorsales La especie nueva solo se conoce de Cerro Pando (frontera entre Costa Rica y Panamá).

scholarly journals Fault reactivation by gas injection at an underground gas storage off the east coast of Spain

2019 ◽  
Author(s):  
Antonio Villaseñor ◽  
Robert B. Herrmann ◽  
Beatriz Gaite ◽  
Arantza Ugalde
Keyword(s):  
East Coast ◽  
Fault Plane ◽  
Source Parameters ◽  
Gas Injection ◽  
Focal Depth ◽  
Gas Storage ◽  
Fault Reactivation ◽  
Underground Gas Storage ◽  
Waveform Modeling ◽  
Valencia Trough

Abstract. During September–October of 2013 an intense swarm of earthquakes occurred off the east coast of Spain associated with the injection of the base gas in an offshore underground gas storage. Two weeks after the end of the injection operations, three moderate-sized earthquakes (Mw 4.0–4.1) occurred near the storage. These events were widely felt by the nearby population, leading to the indefinite shut-down of the facility. Here we investigate the source parameters (focal depth and mechanism) of the largest earthquakes in the sequence in order to identify the faults reactivated by the gas injection, and to help understand the processes that caused the earthquakes. Our waveform modeling results indicate that the largest earthquakes occurred at depths of 6–8 km beneath the sea floor, significantly deeper than the injection depth (~ 1800 m). Although we cannot undoubtedly discriminate the fault plane from the two nodal planes of the mechanisms, most evidence seems to favor a NW-SE striking fault plane. We propose that the gas injection reactivated unmapped faults in the Paleozoic basement, with regional orientation possibly inherited from the opening of the Valencia Trough.

Two new species of Monstera (Araceae: Monsteroideae) from Costa Rica

Phytotaxa ◽  
2020 ◽  
Vol 461 (3) ◽  
pp. 185-194
Author(s):  
MARCO CEDEÑO-FONSECA ◽  
THOMAS B. CROAT ◽  
ALEJANDRO ZULUAGA ◽  
MICHAEL MITTERMEIER ◽  
MARIO A. BLANCO
Keyword(s):  
New Species ◽  
Costa Rica ◽  
Iucn Red List ◽  
Red List ◽  
Costa Rican ◽  
Northwestern Part ◽  
Cordillera Central ◽  
Two New Species ◽  
Iucn Red List Criteria ◽  
Cordillera De Talamanca

Two species of Monstera, apparently endemic to Costa Rica, are newly described and illustrated. Monstera juliusii occurs in the southern Costa Rican portion of the Cordillera de Talamanca at 1600–2250 m, and has been confused with M. standleyana in herbaria. Monstera monteverdensis occurs in the Guanacaste and Tilarán cordilleras, and the northwestern part of the Cordillera Central, at 500–2300 m, and has been confused with M. epipremnoides, M. lentii and M. lechleriana in herbaria. Phenology and suggested conservation categories according to the IUCN Red List criteria are indicated for both new taxa.

A Preliminary Investigation of the Flood Plain of the Rio Grande de Térraba, Costa Rica

1943 ◽  
Vol 9 (1) ◽  
pp. 74-88 ◽  
Author(s):  
Doris Stone
Keyword(s):  
Costa Rica ◽  
Short Distance ◽  
Preliminary Investigation ◽  
Flood Plain ◽  
Mountain Range ◽  
Parallel Chain ◽  
The Pacific ◽  
The Pacific Ocean ◽  
Cordillera De Talamanca ◽  
Coastal Range

The Cordillera de Talamanca, the principal mountain range in southeastern Costa Rica, is a rugged chain which overlies, in part at least, an earlier volcanic mass, and is directly connected with the Chiriqui range of western Panama. The Pacific Ocean is, as the crow flies, a comparatively short distance from the Talamancan peaks. From the Rio Savegre in the southwest to the Rio Chiriqui Viejo in Panama runs a smaller parallel chain, known as the Pacific coastal range.

scholarly journals Symplocos retusa (Symplocaceae), una nueva especie de Costa Rica

Lankesteriana ◽  
2016 ◽  
Vol 4 (1) ◽  
Author(s):  
Ricardo Kriebel ◽  
José González ◽  
Evelio Alfaro
Keyword(s):  
Costa Rica ◽  
Title Page ◽  
Especie Nueva ◽  
Cordillera De Talamanca

<div class="page" title="Page 1"><div class="section"><div class="layoutArea"><div class="column"><p><span>Symplocos retusa</span><span>, una especie nueva restringida a los bosques húmedos de la vertiente Pacífica de la Cordillera de Talamanca en Costa Rica, es descrita, ilustrada y comparada con la especie que se pre- sume es su pariente más cercana. </span><span>Symplocos retusa </span><span>se distingue por sus láminas foliares enteras con el ápice conspicuamente retuso; flores moradas, pentámeras, solitarias, axilares, pediceladas, subtendidas por brácteas deciduas; ápice del fruto plano, excediendo los lóbulos del cáliz. Se compara con </span><span>S. tribracteolata </span><span>Almeda, otra especie endémica de Costa Rica con flores solitarias, pediceladas, blancas a rosadas, hexámeras, y margen de la lámina foliar aserrado o crenado, con el ápice acuminado. </span></p></div></div></div></div>

scholarly journals Description of Onthophagus humboldti and Uroxys bonplandi, two new scarab beetles (Coleoptera, Scarabaeidae, Scarabaeinae) from Costa Rica, with notes on tropical mountain brachyptery and endemicity

ZooKeys ◽  
2019 ◽  
Vol 881 ◽  
pp. 23-51 ◽  
Author(s):  
Bert Kohlmann ◽  
Ángel Solís ◽  
Guillermo Alvarado
Keyword(s):  
New Species ◽  
Costa Rica ◽  
Dna Analysis ◽  
Closely Related Species ◽  
Mountain Ranges ◽  
Tropical Mountain ◽  
Species Groups ◽  
Cordillera De Talamanca ◽  
The Last Glacial ◽  
Scarab Beetles

Two new endemic species of scarab beetles are described from Costa Rica, Onthophagus humboldtisp. nov. and Uroxys bonplandisp. nov.Onthophagus humboldtisp. nov. is also the tenth brachypterous Onthophagus species to be described worldwide, representing also a case of extreme brachyptery in Onthophagini. Illustrations for both new species, as well as marking differences with closely related species are included. Maps showing the distribution of the new species, as well as the distribution of brachypterous and endemic scarab-beetle species for Costa Rica are presented and discussed. The Cordillera de Talamanca represents an area where Scarabaeinae (four genera) show very high known levels of brachypterism in Mesoamerica. A reconstruction of the montane environment in the Cordillera de Talamanca during the Last Glacial Maximum (~24 ka) is analyzed, in order to try to understand a possible historical biogeography model that might promote high levels of brachypterism in scarab-beetles. The present study supports previous proposals that brachyptery is correlated with stable environments associated with deeply incised valleys. Tropical mountain ranges are also identified as having more endemics than lowland rain forests, contradicting accepted wisdom. Lastly, a mitochondrial DNA analysis supports the existence of the Onthophagus dicranius and the O. clypeatus species-groups as two well-defined and closely related branches.

Sign in / Sign up

Export Citation Format

Share Document