During his research he observed that glaciers move by creep in a way analogous to the flow of pitch. From the top of Öræfajökull, which he was first to climb as far as is known, he described Kvíárjökull (Hrútárjökull) in his 1794 work in Jöklarit: The surface appeared to be covered with curved stripes which lay across the glacier, espiacelly up near the main glacier, and the arch of the curves pointed towards the lowland, just as though the descending glacier had flowed down half-melted or as thick, viscous material. Could this be proof that ice, without actually melting, behaves as a liquid to some extent, like some types of resin? In Eldrit Sveinn was the first person, to describe the volcanic belt, which lies across Iceland from southwest to northeast. He was also first to find Gabbro in Iceland.