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Coastal and Marine Geology Program > St. Petersburg Coastal and Marine Science Center > Coasts of Colombia

Coasts of Colombia

Coasts of Colombia
Pacific Coast:
Introduction
Serranía del Baudó (Baudó Range)
Cabo Corrientes-
Togoromá
San Juan River Delta
Málaga Bay - Buenaventura Bay
Buenaventura Bay - Guapi
Patía River Delta
Tumaco Bay
Mira River Delta
Gorgona Island
Malpelo Island
References
Caribbean Coast:
Introduction
Guajira Peninsula Coast
Sierra Nevada de Santa Marta Coast
Magdalena River delta and Santa Marta lagoon complex
Barranquilla - Cartagena coast
Southern Caribbean coast
Gulf of Urabá
References
Project Contact:
Robert Morton

Pacific Coast: Buenaventura Bay - Guapi

The coast from Buenaventura Bay to Guapi Bay extends for about 150 km, with a general S40ºW trend (Fig. 25). The southern Buenaventura Bay shore (Fig. 26) is supplied by the Anchicayá and Dagua Rivers and is a low depositional area characterized by segmented sand bars and extensive, intertidal mud flats and mangrove swamps (Fig. 27) that penetrate more than 10 km inland from the coast.

Farther south, the littoral fringe represents a system of barrier islands (Fig. 28), mangrove and transitional swamps (Fig. 29), and is supplied by numerous rivers. The largest are the Cajambre, Naya, and Micay Rivers that drain the western slopes of the Cordillera Occidental. A dense network of tidal channels interconnects the estuarine lagoons and mangrove interdistributary areas, and the freshwater swamps are backed by cliffs or gently sloping platforms cut into Tertiary sedimentary rocks. Modern barrier islands of this stretch are 2.8 to 5.6 km long and 0.2 to 1.1 km wide and are mostly transgressive features (Martínez et al. 1995, Correa 1996).

Geomorphic classification of the Buenaventura - Guapi Bays littoral zone.
Figure 25. Geomorphic classification of the Buenaventura - Guapi Bays littoral zone Modified from Correa (1996).

Organic-rich tidal flat.
Figure 26. Organic-rich tidal flat on the southern side of Buenaventura Bay. Photo by I. Correa.

Small village bordering a mangrove swamp south of Buenaventura Bay.
Figure 27. Small village bordering a mangrove swamp south of Buenaventura Bay. Photo by I. Correa.

Typical washover sand backbeach of the barrier islands between Buenaventura Bay and Guapi Bay.
Figure 28. Typical washover sand backbeach of the barrier islands between Buenaventura Bay and Guapi Bay. Photo by I. Correa.

Mangrove swamp.
Figure 29. Mangrove swamp (Rizophora mangle) along the northern border of the Guaji estuary. Mangrove trees are as much as 30 m high. Photo by I. Correa.

Coastal and Marine Geology Program > St. Petersburg Coastal and Marine Science Center > Coasts of Colombia

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