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Jeg er geoarkeolog, bor på Tromøya ved Arendal og jobber med undersøkelser og bevaring av steinbygninger, gamle steinbrudd og bergkunst i hele Norge. En stor interesse er tradisjonell kalkbrenning. På denne nettsiden skriver jeg artikler om geologi og kulturminnevern både på norsk og engelsk. Jeg bruker ikke KI. For gleden ved gammel stein! Per Storemyr
I work with the geoarchaeology of old stone: monuments, quarries, rock art. And I try to figure out about their weathering, and conservation using traditional crafts. I also burn lime the traditional way. On this website I publish articles on geology and heritage. I don't use AI. For the joy of old stone! Per Storemyr
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Recent posts
- The Côa Late Palaeolithic rock art in Portugal. A brief comparison with petroglyphs of similar age in Egypt
- Observations of tafoni at Costa Vicentina (Portugal)
- Tafoni in Tertiary shale at 2700 m in the Swiss Alps (Brigels, Graubünden)
- Kalkbrenning i Guédelon. Kalk til bygging av ny middelalderborg i Frankrike
- Tafoni-forvitring på holmer og skjær utenfor Tvedestrand
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Tag Archives: Portugal
The Côa Late Palaeolithic rock art in Portugal. A brief comparison with petroglyphs of similar age in Egypt
On working with Late Palaeolithic rock art in Upper Egypt several years ago, sometimes we used to compare the naturalistic style of newly found petroglyphs with photos of those in the Côa Valley (NE Portugal). This was because the large Côa site has open air petroglyphs, whereas most other Late Palaeolithic rock art sites feature cave paintings. But I was never able to visit the Côa site to see for myself how the petroglyphs compare. Until now. On a road trip this summer we got a glimpse of the Côa images, at the Penascosa site. This brief article shows many similarities between the rock art in Côa and Upper Egypt, but also a harsh difference: Whereas Côa is a well-managed UNESCO World Heritage Site, the rock art in Egypt is under immense risk of destruction by modern mining. Continue reading
Observations of tafoni at Costa Vicentina (Portugal)
This summer’s roadtrip took us all the way from Norway to the southwesternmost tip of Portugal, to Costa Vicentina by the Atlantic. Vicentina offers spectacular coastal cliffs and sandy beaches – perfect places to study geology and tafoni weathering. With cliffs often dominated by Carbonaceous shales and greywackes in turbidite sequences, tafoni weathering is peculiar, visually related to the sturdier layers. Tafoni is also omnipresent in young, Quaternary calcareous sandstones, which is not strange, given that salt and wind along the Atlantic make perfect conditions for tafoni weathering. Here’s a brief report with lots of photos. Continue reading
Posted in Geomorphology, tafoni, Weathering history
Tagged Algarve, Costa Vicentina, Geomorphology, Portugal, salt weathering, sandstone, tafoni, tafoni weathering, turbidite
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