Sambaquis: The Pre-Colonial Legacy in Barra de Ibiraquera

What are sambaquis

Sambaqui is a word of Tupi origin that translates roughly to "shell mound". They are structures built over centuries by pre-colonial populations who accumulated marine shells, oysters, and cockles, interspersed with burials, polished stone tools, hearths, and ornaments. Locally, they are also known as "concheiros".

Far beyond mere refuse heaps, modern research reveals that sambaquis were true funerary monuments, territorial markers, and community gathering points for complex societies perfectly adapted to the coastal ecosystem.

The Sambaquis of Barra: Batuta and Praia dos Amores Connection

Contrary to what many think, you do not have to travel far to see this heritage. Heading north from the lagoon's mouth along a short and easy walk by the edge of Praia do Luz, you encounter an important archaeological site strategically positioned in front of Batuta Island.

In the opposite direction of the lagoon's mouth (heading south), along the trails that cross the hills and rocky cliffs, lies the sambaquí of the Praia dos Amores cliffside. The choice of these locations by the indigenous peoples was no coincidence: from the top of one of these archaeological sites, it is possible to perfectly see the other.

This direct line of sight suggests that these monuments functioned together in the pre-colonial landscape of Barra de Ibiraquera, connecting the resources of the lagoon mouth, the shelter of the cliffs, and the watchpoint over the open sea.

Historical importance and preservation

The sambaquís of Barra de Ibiraquera represent an invaluable archaeological heritage for understanding human occupation on the southern Brazilian coast. These monuments record thousands of years of interaction between indigenous societies and the coastal environment.

The preservation of these sites depends on the respect of visitors and the awareness of the local community. Natural erosion already poses significant challenges, making protection against human impacts even more necessary.

In fact, some of Santa Catarina's sambaquís preserve relics from over 7,000 years of history—making them considerably older than the famous Pyramids of Egypt (the Great Pyramid of Giza, for example, was built around 4,500 years ago). True "Brazilian pyramids," these monuments are the ultimate representation of our ancestry long before the arrival of Europeans.

One of the major obstacles to local appreciation of these structures is the current population's lack of cultural connection and identification with pre-colonial peoples. Recognizing this archaeological legacy is fundamental to reclaiming our indigenous history and preventing this heritage from continuing to be plundered.

Unlike the predatory summer tourism that overburdens the region during high season, archaeological tourism emerges as a sustainable alternative to generate jobs and income all year round. Inspired by successful models like the Serra da Capivara National Park, experts point out that involving the local community is key: when residents benefit economically through conscious tourism, they become the primary defenders and protectors of their heritage.

As soon as the local community and businesses begin to reap the rewards of guided tours and the historical value of monuments like those in Barra de Ibiraquera, Farol de Santa Marta, or Garopaba do Sul, society itself will prevent human action and vandalism from destroying these sources of cultural and economic wealth.

How to visit responsibly

Visiting these locations prompts a profound reflection on time and the ancestry of our region, but demands absolute care. Because they are structures sensitive to erosion, visitors must stay strictly on marked trails, without climbing or walking directly on the shell slopes.

Remember: it is strictly forbidden by federal law to remove any piece of shell, stone, or mineral vestige from the ground. Hiring a certified local guide enriches the experience, helping you see historical layers that often go unnoticed by untrained eyes.

The Sambaquieiros: Who they were and how they lived

Although the term "sambaqui" originates from Tupi-Guarani (where Tãmba means shells and Ki means pile), the original builders of these structures were not the Carijós or Guaranis encountered by Europeans. Research indicates that the first to arrive were the fisher-gatherers, simply named sambaquieiros.

It is not known for certain what the ethnicity or language family of the sambaquieiros was. What archaeology confirms is that they were groups with excellent social organization and advanced technology for crafting tools, inhabiting the southern coast of Santa Catarina hundreds of years before other migrations.

Later in the timeline, the region welcomed peoples of the Macro-Jê language family (represented by the Xokleng and Kaingang) and, finally, the Guarani, who arrived at least 1,000 years ago. The contact, integration, and overlapping of these different cultures over millennia enriched the historical layers that make up these sites.

What do we find in them? Artifacts and Zooliths

Far beyond shells, scientific excavations reveal a fascinating inventory of pre-colonial life. Human skeletons (proving their funerary and sacred function), hunting tools, and hearths are found in the sambaquis. However, the items that draw the most attention due to their technical and artistic sophistication are:

• Zooliths: Impressive sculptures made of polished stone shaped like coastal animals (such as fish and birds). They were likely used in rituals and community worship, though some could assume functional forms, such as knives, plates, or pestles.
• Net Weights (or Boleadoras): Circular artifacts in polished stone that served as weights for fishing nets in the lagoon or sea, or were also used as breast-shaped boleadoras for hunting.
• Spindle Whorls: Small perforated pieces used by the sambaquieiros to spin vegetable fibers. The larger and wider ones also functioned as net weights.
• Body Adornments and Stone Mortars: Highly detailed necklaces made from shells and animal teeth, as well as carved stone mortars typically used to crush seeds and prepare food.

Threats of the past and present

The greatest threat to the historical survival of the sambaquis has always been human activity. Since the colonial period, and with great intensity in the 19th century, these ancient monuments were viewed merely as commercial limestone "deposits." Billions of historical shells were completely destroyed to produce lime (used in the mortar of colonial houses), fertilizers, and even as ballast for the foundations of roads, railways, and airport runways in the South of the country.

To put the gravity of this predatory exploitation into perspective, in the 1960s, the massive Sambaqui da Carniça I (in Laguna) was originally 400 meters long and 30 meters high. At that time, a limestone industry set up on-site extracted 25 to 30 truckloads of shell meal daily to supply rice plantations in Rio Grande do Sul. Within a few years, the monument was practically leveled.

Commercial destruction only began to slow down with Federal Law No. 3,924 in 1961, but illegal extraction and the use of the material by local municipalities and individuals persisted until the 1980s. Today, the danger has shifted: vandalism, lack of awareness, and degrading motorized sports (such as motocross, off-roading, and sandboarding directly on the shell slopes) continue to threaten this open-air archive of Brazil's history.