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Caldeira das Sete Cidades

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description Caldeira das Sete Cidades Overview

The Caldeira das Sete Cidades is a large tuff-cone crater located on São Miguel Island in the Azores archipelago. Formed during the Pleistocene epoch through volcanic activity, it features a maar-caldera structure containing two distinct lakes—one blue and one green—resulting from varying mineral compositions within the caldera floor. This geological formation is of interest to geologists studying volcanic processes and offers significant landscape views for visitors and researchers alike.

help Caldeira das Sete Cidades FAQ

Why are there two different colored lakes in the Caldeira das Sete Cidades?

The caldera contains two distinct lakes—one blue (Lagoa Azul) and one green (Lagoa Verde)—which result from varying algae and mineral concentrations reflecting the light differently. The physical divide is formed by a narrow land bridge within the crater.

What type of geological formation is the Caldeira das Sete Cidades?

It is a large tuff-cone crater featuring a maar-caldera structure. It was formed during the Pleistocene epoch through explosive volcanic activity on São Miguel Island.

Where is the Caldeira das Sete Cidades located?

This iconic natural landmark is located on São Miguel Island in the Azores archipelago, an autonomous region of Portugal. It is one of the most popular tourist destinations in the Atlantic islands.

What does the name Sete Cidades mean?

The name translates to "Seven Cities" in Portuguese. It is derived from a traditional Portuguese legend about a princess and her shepherd lover whose tears formed the blue and green lakes.

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