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CHOICE · EXPERIMENTARY · TAKE

A notebook.
Your findings.

Up to six proposals of Cabeceiras, in your own order, to do it at home, in company or on a break.

2 de 6 propostas escolhidas · faça-as ao seu ritmo.

PROPOSTA 1 DE 2 · Between rivers and mountains

Compare three grain sizes

Geological complex of Cabeceiras de Basto · regional study

Granite varies in grain size too

In A. Almeida’s study, granite from the Cabeceiras de Basto complex does not have a single grain size. The classification uses three average ranges: 0.5–1 millimetre for fine grain, 2–4 millimetres for medium grain and 5–7 millimetres for coarse grain. In the last group, the author also mentions rare larger crystals measuring 8–10 millimetres. This distinguishes two observations: the usual grain size and the presence of a few crystals that stand out. The description does not turn every visible point in a photograph into a measurement. Comparing sizes in an image requires a scale; magnification on a screen can make small grains look large. The study identifies three genetically independent series despite their similar chemical-composition ranges. Appearance is a starting point for investigation, not the entire explanation of origin. In a wall or façade, grains spark curiosity, but do not alone prove where the stone came from.

Vamos experimentar?

  1. In a millimetric ruler, 1 mm, 3 mm and 6 mm are examples within the three ranges described.
  2. Draws three small fields with points of different sizes, identifying them as a scaleless scheme.
  3. Adds some larger crystals to the third field. It distinguishes the average dimension of the presence of exceptions.

Exercise on paper. It does not require collecting rocks, scratching walls or removing fragments.

Open a história e os seus recursos →
Sources of this proposal

My findings

An idea, a drawing or a question to go on.

PROPOSTA 2 DE 2 · Travel through time

Try observing

Gondiães and Vilar de Cunhas · memory and landscape

A house with three granaries

At Casa de Chouzas, three 19th-century granaries stand alongside the manor house highlighted by the municipality. The group connects two functions: living and storing the harvest. Rather than looking only at the main house, it is worth recognising the importance of buildings supporting agriculture. The introduction to Vilar de Cunhas places this heritage in a landscape of plateau and mountain, shaped by farming and pastoralism. House and granaries can be read in that working context, although the source does not detail each property’s production. The house’s dating is less firm: the municipality presents it as perhaps 19th-century, while assigning the granaries to the 19th century. That difference should remain visible. The photograph accompanying the reading shows the portal, not the three granaries. The heritage reference does not confirm access to the group.

Vamos experimentar?

  1. Look at the photo of the portal and list only the elements you can see.
  2. Compared to the three granaries mentioned in the text: what depends on the written description?
  3. Imagine a caption that distinguishes the frame of the photograph from the remaining patrimonial set.

An activity to try at your own pace, without collecting specimens.

Open a história e os seus recursos →
Sources of this proposal

My findings

An idea, a drawing or a question to go on.

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