The area of Lycksabäcken northwest of Lycksele is a national interest of natural conservation because of its geological values with many unique landforms. Many of these landforms indicate that the deglaciation process in the area was very complex. However, the deglaciation process in the area has not previously been fully understood. The aim is to add to the knowledge of the events that took place during the last deglaciation. To do this, the glaciofluvial landforms in the area were mapped by studying aerial photographs with a Wild Aviopreter and a five-day field inventory of key areas for the interpretation. These landforms were then transferred to a map in ArcGIS in which scenarios of the deglaciation were constructed. The inversion from landform pattern to a scenario of the deglaciation was based on seven general assumptions and the attempt to create the least complex explanation of the origin of these landforms. The results show that the valley of Umeälven must have been blocked at least three times during the deglaciation in the area, which lead to a redirection of the meltwater flow into the area of Lycksabäcken. There, dead ice played a major role in the formation of the glaciofluvial landforms by damming lakes which enabled delta formation, the formation of many meltwater channels and a large sandur. During the field inventory a large amount of preglacially weathered rock surfaces was found in the area which would be interesting to investigate further.

Syftet med arbetet är att kartlägga geomorfologin och landskapsutvecklingen i Sarekområdet med hjälp av LiDAR (Light Detection and Ranging) data. LiDAR är en metod för fjärranalys som kan används i syfte att kartlägga markytan utan vegetation som störmoment. Datan erhölls från Lantmäteriet och har en punkttäthet på 1 punkt per kvadratmeter. Denna data bearbetas i GIS (ArcMap) för att skapa en terrängskuggning. Området för karteringen ligger strax sydöst om Sarekmassivet, vid vilket den senaste istiden tros ha dragit sig tillbaka emot. Tidigare kartering av området har gjorts av bland annat Sveriges Geologiska Undersökning där karteringen baserats på traditionella metoder som fältobservationer och flygfotoanalyser. Detta projekt bidrar till en ny kartering av en del av Sarekområdet. Där användning av LiDAR fått tidigare icke-karterade landformer att framkomma. Landformernas utseenden genom bearbetning av LiDAR uppvisas. Baserat på dessa landformer tolkas en generell deglaciationsriktning i det karterade området, röra sig från öst till väst. / The aim of this project is to map the geomorphology and landscape development in the Sarek area, with the help of LiDAR (Light Detection and Ranging). LiDAR is a remote sensing method that can be used for the purpose of mapping the ground surface without the disturbance of vegetation. The data in this project was obtained from the Swedish authority Lantmäteriet and has an accuracy of 1 point per square meter. The obtained data was processed in GIS (ArcMap) to create a hillshade raster. The area for the mapping is located southeast of the Sarek massif, around which the latest ice age is believed to have retreated towards. Previous mapping in the area has been done by the Geological Survey of Sweden (SGU), which has been based on the more traditional methods of field observations and aerial photos. This project's purpose is to provide a new mapping of an area at the east side of the Sarek massif. Where the use of LiDAR has provided new, not before mapped landforms to arise. The appearance of the landforms by adaptation of LiDAR is displayed. Based on these landforms an interpretation of the general deglaciation tendency in the mapped area is shown to move from east to west.

Det Jämtländska fjällområdet Frostviken har under den senare delen av Weichsel haft ett komplicerat deglaciationsförlopp. Glacialfluviala landformer som ansamlingar av morän, lineationer och laterala smältvattenrännor är tydliga i landskapet. Vid glacialfluviala studier av postglaciala områden förstärks kunskapen om sedimenttransport som förändrat jordlagerföljder och format om landskapet. Den vetskapen kan vidare användas i samhällsplanering och jordbruk för att anpassa utbyggnad eller ombyggnad av befintlig miljö. Under deglaciationen bildades den omfattande issjön Frostviksissjön, en issjö vars tappningsränna inte kunnat lokaliseras i tidigare studier. Arbetet har utgått från en historisk kronologisk litteraturstudie tillsammans med en analys av LiDAR-data för att säkerställa och ifrågasätta den glacialfluviala transporten i landskapet. I detta arbete presenteras en möjlig tappningsränna för Frostviksissjön vid Storbergets östra sida och issjön är rekonstruerad med hjälp av strandnivåkarta från SGU. Landformerna i området har undersökts för att härleda om de härrör från den senaste nedisningen under Weichsel eller från tidigare nedisningar. / The mountain area in the most northwest part of Jämtland is Frostviken, which during the latter part of the Weichsel had a complicated deglaciation process. Glaciofluvial landforms such as accumulations of moraine, lineations and lateral meltwater channels are evident in the landscape. Glaciofluvial studies of postglacial areas emphasize knowledge about sediment transport that has changed soil layer sequences and reshaped the landscape. This knowledge can also be used in community planning and agriculture to adapt the expansion or rebuilding of the existing environment. During the deglaciation, the extensive ice lake Frostviksissjön was formed, an ice lake where the main spillway has not been interpreted in previous studies. The work has been based on a historical chronological literature study together with an analysis of LiDAR data to ensure and question the glaciofluvial transport in the landscape. In this study, a possible main spillway has been presented for Frostviksissjön on the eastern side of Storberget. The ice lake has been reconstructed using a shore level map from SGU. The landforms in the area have been studied in accordance with whether they originate from the most recent glaciation during the Weichsel period or derives from previous glaciations.