The Baixa do Norte is located 2 kilometres (1.1 nmi) from Ponta da Espalamaca, at a depth of approximately 100–150 metres (330–490 ft), to a depth reaching 17 metres (56 ft) below sea level.
The leading edge of the Baixa do Norte reef includes a series of large rocky outcrops, of less than 5 metres (16 ft) in size.
Considered a minor reef, the Baixa do Norte has been used by some fishers, who extended their catches from the Baixa da Barca.
The Baixa is characterized by peaks at the 25 metres (82 ft) depth, with large blocks of rock and a fishery of considerable dimension.
In comparison, the southern margins is characterized by peaks to about 30 metres (98 ft) consisting of peaks and valleys.

The southern or Baixa do Sul is a meridianal reef situated 2 nautical miles (3.7 km) southeast of the port of Horta.
It is located approximately 8 metres (26 ft) below sea level.
The entire channel is distinguished by geological structures, including two sub-aquatic caldeiras, between 3–8 metres (9.8–26.2 ft) diameter.

Until about 30 metres (98 ft) below sea level, the area is dominated by extensive uninterrupted boulders, with a terrain that is rugged and divided by metres.
Some of these cassums are broken by abrasive calderas, formed from large boulders grinding into the reef floor.
These covas de gigante (giants' holes), some 8 metres (26 ft) deep and 3 metres (9.8 ft) diameters that permit movement.
The Baixa do Norte is located 2 kilometres (1.1 nmi) from Ponta da Espalamaca, at a depth of approximately 100–150 metres (330–490 ft), to a depth reaching 17 metres (56 ft) below sea level. The leading edge of the Baixa do Norte reef includes a series of large rocky outcrops, of less than 5 metres (16 ft) in size. Considered a minor reef, the Baixa do Norte has been used by some fishers, who extended their catches from the Baixa da Barca. The Baixa is characterized by peaks at the 25 metres (82 ft) depth, with large blocks of rock and a fishery of considerable dimension. In comparison, the southern margins is characterized by peaks to about 30 metres (98 ft) consisting of peaks and valleys.
The southern or Baixa do Sul is a meridianal reef situated 2 nautical miles (3.7 km) southeast of the port of Horta. It is located approximately 8 metres (26 ft) below sea level. The entire channel is distinguished by geological structures, including two sub-aquatic caldeiras, between 3–8 metres (9.8–26.2 ft) diameter.
Until about 30 metres (98 ft) below sea level, the area is dominated by extensive uninterrupted boulders, with a terrain that is rugged and divided by metres. Some of these cassums are broken by abrasive calderas, formed from large boulders grinding into the reef floor. These covas de gigante (giants' holes), some 8 metres (26 ft) deep and 3 metres (9.8 ft) diameters that permit movement.
Faial-Pico Channel