{"product_id":"decay-of-our-cultural-heritage-in-stone-von-jan-olof-holger-swantesson","title":"Decay of our cultural heritage in stone","description":"\u003cp\u003eOur cultural heritage made of stone has in many  parts of the world seen to be deteriorating during  the last century. There is a debate about the  reasons for the breakdown. Is it mainly natural, or  is it induced by man? Little is also known about how  fast the deterioration is. In Sweden the Bronze Age  rock carvings have been of greatest interest.  Downwearing rates at more than 20 rock carving sites  have been measured with repeated laser scanning  during a 10 year long period. The sites and the  micro-weathering processes are described in the  work, as well as calculations of rock surface  roughness. There is a great variation in how well  the rock carvings are preserved at different places.  Sometimes they are in an excellent state, while they  at other places clearly are under destruction.  Although average downwearing rates are not faster  than on Swedish Precambrian rocks in general they  are in many cases fast enough to obscure the ancient  rock art and to make this important cultural  heritage to disappear. The book is of value for all  those who are working and studying ancient monuments  and buildings made of stone, regardless of what  their main academic subject is.\u003c\/p\u003e\u003cdiv class=\"aw-variant-hidden-subtitle-div\" id=\"aw-variant-subtitle-9783838340531\"\u003e\u003ch3\u003e- exemplified with deterioration rates measured by laser scanning of Swedish Bronze Age rock  carvings\u003c\/h3\u003e\u003c\/div\u003e","brand":"Autorenwelt Shop","offers":[{"title":"Softcover - 9783838340531","offer_id":39498958569565,"sku":"9783838340531","price":49.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0940\/0622\/files\/73461_0d7c3f78-6db1-4170-9768-ca32510ab355.jpg?v=1786078925","url":"https:\/\/shop.autorenwelt.de\/products\/decay-of-our-cultural-heritage-in-stone-von-jan-olof-holger-swantesson","provider":"Autorenwelt Shop","version":"1.0","type":"link"}