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Geological Interpretive Panels


We present in this section the interpretative panels produced by GeoHereditas within the project Northern Coast Geoturism Route. This project aims to disseminate the making use of a familiar resource, the information panels.

 

With this project we also seek to raise public awareness of the importance of the geological features of the north coast of São Paulo, which together constitute the geological heritage of the region, which deserves to be understood and preserved.

 

 


 

 

In the landscapes of the north coast we can see the mountains, the slopes of the hills, the beaches, the sands, rocky shores ... but what is the origin and the relation between all these elements?

 

The explanation of these questions lies in geosciences, and our panels help us understand how geological history has created the landscapes and the features we see today in the region.

 

Where does the sand on the beach come from?

When you look closely at a stone on the rocky shore or in the mountains, you realize that it is made of small pieces with different colours ? these are the minerals...

The rocks beneath our feet

The crust is the outermost layer of our planet, on which we live. Under some continents, it can be up to 70 km thick, which means kilometers of minerals and rocks. If you dig deep, that's what you will find. And if digging in the state of São Paulo, there are great chances of finding a granite, as this rock makes up at least 30% of its crystalline basement...

What is a geological map?

You have certainly seen a road map. It shows the roads, the names of municipalities, places to snack, etc., and usually comes with a caption explaining what each symbol means. A geological map is the same: it shows the rocks that are beneath our feet. See the example of the geological map of Anchieta Island!...

A story that comes from far away

With the breakup of the Gondwana supercontinent, the edges of the block corresponding to South America were uplifted and split into a series of blocks resembling a line of fallen dominoes, some higher, others lower. In this way arose the Serra do Mar!

 

Geological time: The long history of the Earth

While walking along the coast you see mountains, cliffs, beaches, oceans, islands, valleys and rivers. All these elements are part of the geological history of this region, which is engraved on the rocks and landscapes. To understand this history, all we need to learn is how to read what rocks have to tell us...

What is the reason for these large, flat areas?

Plains are flat areas of varying sizes formed by sediments brought by rivers or the sea. These sediments provide important information on variations in sea level along the history of our planet. In the case of the Brazilian coast, these variations were caused mainly by natural climate change over time...

 

Formation of the Gondwana Supercontinent

Do you know how our planet is inside? Just like an egg, the Earth is made up of concentric layers. The eggshell correspond to the outer rocky layer of the Earth - the crust; the clear, to the mantle and the yolk, to the core. The crust under the oceans is younger and heavier. The crust of the continents is older and lighter...

Dykes: evidence of fragmentation of the Earth's crust

Do you know how a continent breaks up? Its edges are "pulled" in opposite directions, causing deep fractures in the rock. Imagine the forces involved in this process! Through these fractures an almost liquid, very hot molten material (magma) coming from the Earth's mantle rises under great pressure...

What is the sand made of?

Sand is composed of fragments of minerals, rocks and hard parts of living organisms. Quartz is the most common mineral found in the sands of the beaches because it is very resistant to physical and chemical changes (erosion and weathering)...

Where do the blocks along the beach come from?

Observe the blocks of different sizes and shapes on Garapocaia Beach. Where did they come from and why are they loose? To answer this question it is necessary to go back in time about 80 million years ago -- yes, 80 million!

The transport of blocks by rivers

Walking through the park you see blocks of various sizes in the river. These come from the erosion of rocks that make up the nearby mountains and were brought here by the Ouro River. At the headwaters, where the terrain is steepest, the river has enough power to carry very large blocks...

The roots of ancient volcanoes

Walking around Ilhabela you may have already noticed the presence of peaks over a thousand meters high that stand out in relief, like the peaks of Baepi in the north and São Sebastião in the south. These massive rock bodies formed about 80 million years ago. At that time in the remote past, volcanoes pushed up through much older gneisses and granites...

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