{"id":18580,"date":"2023-03-23T10:00:00","date_gmt":"2023-03-23T09:00:00","guid":{"rendered":"http:\/\/globetree.se\/?page_id=18580"},"modified":"2023-04-25T21:08:35","modified_gmt":"2023-04-25T19:08:35","slug":"sten-skane","status":"publish","type":"page","link":"https:\/\/globetree.se\/en\/sten-skane\/","title":{"rendered":"Sten – Sk\u00e5ne"},"content":{"rendered":"
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Sk\u00e5ne County - Glysboda, G\u00f6inge<\/h2>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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Black diabase (dolerite)
approx. 1220 million years<\/u><\/p>\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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I am an angular boulder of black diabase, as the Americans call me, or dolerite as the British say, from a quarry at Gylsboda in G\u00f6inge in northern Sk\u00e5ne (or Scania, as the southernmost part of Sweden is sometimes called in English). Sk\u00e5ne has the very youngest bedrock in Sweden; The Cretaceous limestone in southwestern Sk\u00e5ne is as young as 60 million years, and a large part of the sedimentary bedrock in Sk\u00e5ne is from the age of the dinosaurs, between 66 and 200 million years ago. Geologists think this is very young, at least in Sweden. But up in the forests in G\u00f6inge in northern Sk\u00e5ne, the bedrock is significantly older, it is similar to that in Halland and Sm\u00e5land. I myself, I am approximately 1220 million years old, and belong to a swarm of steep diabase dykes that stretch in a north-south direction from Sk\u00e5ne through Sm\u00e5land roughly along the E4 highway up to Lake V\u00e4ttern.<\/p>

The geologists have sometimes called our swarm of diabase dykes hyperite diabases, because the diabases contain a mineral called hypersthene (a kind of pyroxene), and sometimes Protogine zone diabases, because we follow a large shear zone in the bedrock called the Protogine zone, which runs from Sk\u00e5ne through Sm\u00e5land up to lake V\u00e4ttern (and then it continues to V\u00e4rmland, but there are no such diabases in V\u00e4rmland). The stone industry, which has mined several diabase dykes in quarries in northern Sk\u00e5ne, refers to us as \"black granite\", but that is actually quite wrong. Granite is light gray or reddish and rich in the element silicon and the mineral quartz, while diabase is dark and poor in silicon and quartz.<\/p>

Diabase is formed from basaltic magma - molten rock - which seeps up along cracks in the earth's crust from the underlying mantle. This occurs when a landmass, a continent, is stretched and is breaking apart. Apparently the crust in southern Sweden was rifting along a north-south zone when I was forming, because magma could push up all the way from the mantle. But luckily for the Swedes, the splitting stopped, so Halland, western Sk\u00e5ne and western Sm\u00e5land were never separated from Blekinge, eastern Sk\u00e5ne and eastern Sm\u00e5land, but they are still hanging together.<\/p>

If the basalt magma solidifies as a large body down at depth, the rock is called gabbro, and becomes quite coarse-grained (because it takes a long time for the magma to cool and solidify, so the mineral grains that are formed can grow for a long time). If magma solidifies in a (usually) steep crack in the rock, the rock is called diabase. It usually becomes finer-grained, because it has solidified faster. But the diabases in our swarm are unusually coarse-grained for being diabases, and unusually dark, almost entirely black. If magma flows out onto the surface as lava during a volcanic eruption, the rock is called basalt and becomes very fine-grained.<\/p>

Each of the diabase dykes in our swarm is perhaps a few tens of meters wide, or one hundred meters, and a few kilometers long. But taken as a whole, we occur within a 20-30 km wide belt with a length of nearly 300 kilometers, from southern Sk\u00e5ne up to Lake V\u00e4ttern.<\/p>

The black diabase has been popular as a building stone, and is quarried or has been quarried at several places in northern Sk\u00e5ne. Riksbankshuset in Stockholm has a facade of such diabase. It has also been popular with sculptors and used for various sculptures and other monuments. Not least the contrast between polished and rough-hewn surfaces can give a very special effect for such purposes.<\/p>

Geologist \u00c5ke Johansson<\/em>
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Back to the Stone Circle<\/a><\/span><\/p>\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"

SK\u00c5NE l\u00e4n – GLYSBODA, G\u00d6INGE Svart diabasca 1220 miljoner \u00e5r Jag \u00e4r ett kantigt stenblock av svart diabas fr\u00e5n ett stenbrott vid Gylsboda i G\u00f6inge i norra Sk\u00e5ne. Sk\u00e5ne har ju den allra yngsta berggrunden i Sverige; kritkalkstenen i sydv\u00e4stra Sk\u00e5ne \u00e4r s\u00e5 ung som 60 miljoner \u00e5r, och en hel del av den sediment\u00e4ra …<\/p>\n

Sten – Sk\u00e5ne<\/span> Read More \u00bb<\/a><\/p>","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_uag_custom_page_level_css":"","_mi_skip_tracking":false,"site-sidebar-layout":"default","site-content-layout":"default","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":""},"uagb_featured_image_src":{"full":false,"thumbnail":false,"medium":false,"medium_large":false,"large":false,"1536x1536":false,"2048x2048":false,"trp-custom-language-flag":false},"uagb_author_info":{"display_name":"Peroy","author_link":"https:\/\/globetree.se\/en\/author\/peroy\/"},"uagb_comment_info":0,"uagb_excerpt":"SK\u00c5NE l\u00e4n – GLYSBODA, G\u00d6INGE Svart diabasca 1220 miljoner \u00e5r Jag \u00e4r ett kantigt stenblock av svart diabas fr\u00e5n ett stenbrott vid Gylsboda i G\u00f6inge i norra Sk\u00e5ne. Sk\u00e5ne har ju den allra yngsta berggrunden i Sverige; kritkalkstenen i sydv\u00e4stra Sk\u00e5ne \u00e4r s\u00e5 ung som 60 miljoner \u00e5r, och en hel del av den sediment\u00e4ra…","_links":{"self":[{"href":"https:\/\/globetree.se\/en\/wp-json\/wp\/v2\/pages\/18580"}],"collection":[{"href":"https:\/\/globetree.se\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/globetree.se\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/globetree.se\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/globetree.se\/en\/wp-json\/wp\/v2\/comments?post=18580"}],"version-history":[{"count":19,"href":"https:\/\/globetree.se\/en\/wp-json\/wp\/v2\/pages\/18580\/revisions"}],"predecessor-version":[{"id":19564,"href":"https:\/\/globetree.se\/en\/wp-json\/wp\/v2\/pages\/18580\/revisions\/19564"}],"wp:attachment":[{"href":"https:\/\/globetree.se\/en\/wp-json\/wp\/v2\/media?parent=18580"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}