Tag Archives: limestone

Impressions of limestone bioerosion on the Croatian island of Mljet

Posted on August 21, 2025 by Per Storemyr

As the final destination of our family’s road trip through Europe this summer, the Croatian island of Mljet offered a beginner’s crash course on bioerosion of limestone. My experience in weathering has mostly been connected to abiotic phenomena such as salt and frost weathering, so it was fascinating to observe the bizarre forms made by living organisms, especially in the littoral zone of the rocky coast. Particularly interesting is the boring into the limestone by bivalves, limpets, barnacles and several other organisms. Continue reading →

Posted in Geomorphology | Tagged Adriatic Sea, bioerosion, biokarst, boring organisms, coastal bioerosion, Croatia, Geomorphology, karst, limestone, Mljet | 6 Comments

Slag in Norwegian medieval lime mortars

Posted on October 7, 2024 by Per Storemyr

During investigation of Hedrum church by Larvik in the winter of 2023, it was noticed that its hard, medieval lime mortars contained large amounts of slag fragments. By then it was not obvious whether the slag had been deliberately added, for example deriving from bog iron production, or whether it was naturally resulting from the burning of impure limestone at high temperatures. Subsequently, slag was discovered in medieval mortars at several other churches. Slag formation was also seen during contemporary, small-scale burning of impure limestone for restoration purposes. Hence, it became increasingly evident that “native” slag from the limestone itself is an ingredient not uncommon in old, Norwegian mortars. On further investigation and analysis, the significant hydraulic character of such mortars was moreover elucidated. This article discusses slag and other compounds and what effects they have on mortar properties. Continue reading →

Posted in Archaeology, lime burning, Monument conservation, Norway | Tagged Hedrum church, kalk, kalkbrenning, kalkmørtel, kalkmørtel mikroskopi, kalkovn, kalkstein, lime, lime burning, lime mortar, lime mortar microscopy, limestone, marble, marmor, Nøtterøy church, slag, slag in lime mortar, slagg, slagg i kalkmørtel, tradisjonshåndverk, tradisjonskalk, Ulnes church | 2 Comments

Norwegian medieval lime mortars under the microscope

Posted on December 28, 2023 by Per Storemyr

Happy New Year to all my readers! Having burnt lime the small-scale, traditional way for some time, over the last couple of years my interest in the fascinating world of old Norwegian lime mortars has intensified. As 2023 draws to … Continue reading →

Posted in Archaeology, lime burning, Marble, Monument conservation, Norway | Tagged kalk, kalkbrenning, kalkmørtel, kalkmørtel mikroskopi, kalkovn, kalkstein, lime, lime burning, lime mortar, lime mortar microscopy, limestone, marble, marmor, tradisjonshåndverk, tradisjonskalk | 5 Comments

Også et stykke verneverdig Norge: De 60 steinbruddene ved middelalderens klosterruiner på Selja, Hovedøya og Rein

Posted on January 25, 2016 by Per Storemyr

Riksantikvarens bevaringsprogram for middelalderruiner dreier seg ikke bare om istandsettelse av ruinene. Det dreier seg også om forskning for å forstå hvordan bygging av klostre, kirker og borger foregikk. Geologi og steinbrudd er en naturlig del av dette temaet. Nå foreligger det en omfattende rapport om steinbrudd ved tre av Norges mest kjente middelalderklostre: Selja i Sogn og Fjordane, Rein i Sør-Trøndelag og Hovedøya ved Oslo. Det er funnet ikke mindre enn 60 steinbrudd. Men langt fra alle ble brukt til klosterbyggingen. For landskapene var lokale ressurssentra for stein nesten opp til våre dager. Hvordan registrerer og bevarer vi slike steinbruddslandskap? Det er også et av temaene i rapporten. Den er utarbeidet av Per Storemyr i samarbeid med Riksantikvaren og de respektive fylkeskommuner og er tilgjengelig i Riksantikvarens Vitenarkiv. Continue reading →

Posted in Archaeology, New projects, New reports, Norway, Old quarries | Tagged ancient stone quarrying, Cultural heritage, gneiss, Hovedøya, limestone, Norway, olivine, Reinskloster, sandstone, Selja, soapstone | 2 Comments

New ways of looking at highly organised stone quarrying in Ancient Egypt

Posted on May 20, 2015 by Per Storemyr

The ancient Egyptians are considered “conservative” as regards technology and crafts. Yet, with their mastery of organisation, they took quarrying of stone to new levels, especially from the New Kingdom on, from about 3500 years ago. The manner, in which they quarried their huge amount of stone from then on, is reflected even in modern-day stone quarrying.

In a brand new paper James Harrell and I take a fresh look at the evidence for very systematic extraction of sandstone and limestone that commenced by the New Kingdom. Key is the introduction of very long chisels and broad extraction platforms. The organised quarrying was obviously related to the grand building projects by well-known kings such as Ramesses II. And it is particularly well-displayed at famous quarrying sites, such as Gebel el-Silsila between Luxor and Aswan, and el-Sawayta by Minya. We also follow the manners in which quarrying took place prior to the New Kingdom – and we look at analogies from many periods and cultures, from the Minoans until today.

Read on, and you will get the abstract, a gallery of quarry images and link to the PDF. Continue reading →