Bimodal volcanism in northeast Puerto Rico and the Virgin Islands (Greater Antilles Island Arc): Genetic links with Cretaceous subduction of the mid-Atlantic ridge Caribbean spur

Lithos ◽  
2008 ◽  
Vol 103 (3-4) ◽  
pp. 393-414 ◽  
Author(s):  
Wayne T. Jolly ◽  
Edward G. Lidiak ◽  
Alan P. Dickin
Keyword(s):  
Puerto Rico ◽  
Virgin Islands ◽  
Island Arc ◽  
Greater Antilles ◽  
Bimodal Volcanism ◽  
Mid Atlantic Ridge ◽  
Cretaceous Subduction

Source identification of Middle Age extreme event deposits in the Lesser Antilles using forward numerical modeling of tsunami

2021 ◽  
Author(s):  
Louise Cordrie ◽  
Audrey Gailler ◽  
Nathalie Feuillet
Keyword(s):  
Puerto Rico ◽  
Extreme Event ◽  
Virgin Islands ◽  
Lesser Antilles ◽  
Greater Antilles ◽  
Seismic Cycle ◽  
The Caribbean ◽  
Run Up ◽  
Bathymetric Grids ◽  
Northern Segment

<p><span>The arc of the Lesser Antilles is one of the most quiet subduction zone in the world. In this region, the convergence of the Atlantic and the Caribbean plates is low (</span><span>few </span><span>mm/year) and most of the seismicity is a</span><span>n</span><span> intraplate and crustal seismicity. Among the Mw>7 earthquakes recorded in the historical catalog (1690 near Barbuda, 1843 near Guadeloupe, 1867 near the Virgin Islands, 1839 offshore Martinica, 1969 offshore Dominica, 1974 near Antigua), only the 1839 and 1843 events are suspected to be interplate earthquakes. The 1867 Virgin Island earthquake generated an important tsunami with waves of 10m that devastated the closest islands. A tsunami followed the 1843 earthquake but without much damage. These two events are the only known damaging tsunami in this region, but another older one might be added to the list. Indeed, an increasing number of tsunami deposits have been identified in the recent years on several islands of the arc, all of them being around 500 years old (~1450 AD). These deposits are all located in the northern segment of the arc, between Antigua and Puerto-Rico, in Anegada, St-Thomas (Virgin Islands), Anguilla </span><span>and</span><span> Scrub islands. There is </span><span>unfortunately</span><span> no record and no testimonies of an extreme event at that time.</span></p><p><span>The northern segment of the arc is particularly complex because located at the transition </span><span>between</span><span> the Greater Antilles </span><span>and the Lesser Antilles</span><span>. </span><span>It</span><span> is crossed by the Anegada Passage, a series of faults and basins cutting through the arc, which defines the limit between the Puerto-Rico micro-plate and the Caribbean plate. This passage and the numerous intra-arc fault systems present between the islands are active and likely compensate for the plates motion. The very low slip deficit detected with GPS measurements at the subduction contacts of Puerto-Rico and the Lesser Antilles indicates that the interface from Guadeloupe to Puerto-Rico can be considered as totally uncoupled or holding the characteristics of a very long seismic cycle. A tsunami generated by an extreme event 500 years ago in this region could be related to </span><span>intra-arc, outer-rise,</span><span> intraplate </span><span>or</span><span> interface fault rupture. The identification of the source </span><span>would</span><span> enable a better understanding of the seismic cycle and the dynamic of this part of the arc.</span></p><p><span>This study lists </span><span>and set models of</span><span> all the potential faults that could trigger an earthquake in the area encompassing the three islands : Anguilla, Anegada and StThomas. </span><span>We have created high-resolution bathymetric grids and</span><span> performed tsunami simulations </span><span>for each fault model</span><span>. </span><span>W</span><span>e uses run-up models to compare the simulated wave heights </span><span>and run-up distance</span><span> to all the deposits heights </span><span>and positions</span><span>. The magnitudes of our fault models range between 7 and </span><span>9,</span><span> but very few of them generate a strong enough tsunami t</span><span>o</span> <span>match</span><span> the observ</span><span>ed deposits</span><span>.</span></p>

Island-Arc Structure Interpreted from Aeromagnetic Data Near Puerto Rico and the Virgin Islands

1966 ◽  
Vol 77 (2) ◽  
pp. 153 ◽  
Author(s):  
ANDREW GRISCOM ◽  
WILBURT H. GEDDES
Keyword(s):  
Puerto Rico ◽  
Virgin Islands ◽  
Island Arc ◽  
Aeromagnetic Data

High-Mg andesites and related lavas from southwest Puerto Rico (Greater Antilles Island Arc): Petrogenetic links with emplacement of the Late Cretaceous Caribbean mantle plume

Lithos ◽  
2007 ◽  
Vol 98 (1-4) ◽  
pp. 1-26 ◽  
Author(s):  
Wayne T. Jolly ◽  
Johannes H. Schellekens ◽  
Alan P. Dickin
Keyword(s):  
Puerto Rico ◽  
Mantle Plume ◽  
Late Cretaceous ◽  
Island Arc ◽  
Greater Antilles

scholarly journals Bixa orellana (annatto).

2020 ◽  
Author(s):  
Eduardo Ventosa
Keyword(s):  
Risk Assessment ◽  
Puerto Rico ◽  
Exotic Species ◽  
Pacific Islands ◽  
Virgin Islands ◽  
Greater Antilles ◽  
Bixa Orellana ◽  
Small Tree ◽  
Tropical Africa ◽  
East Indies

Abstract B. orellana is a shrub or small tree which was one of the first American plants to be introduced into southern Asia and tropical Africa and soon became naturalized in these areas and in the East Indies (Morton, 1960). It is recognized as an exotic species in the Lesser and Greater Antilles. In Puerto Rico and the Virgin Islands it is considered to be naturalized (Acevedo-Rodríguez and Strong 2012). It is listed as invasive principally on Pacific islands, although a risk assessment considers it as low risk in the region (PIER, 2015).

Geology and hydrogeology of the Caribbean islands aquifer system of the Commonwealth of Puerto Rico and the U.S. Virgin Islands

2002 ◽  
Author(s):  
Robert A. Renken ◽  
W. C. Ward ◽  
I.P. Gill ◽  
Fernando Gómez-Gómez ◽  
Jesús Rodríguez-Martínez ◽  
...  
Keyword(s):  
Puerto Rico ◽  
Virgin Islands ◽  
Aquifer System ◽  
Caribbean Islands ◽  
The Caribbean ◽  
The U.S
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