Sökning: "grainstone"
Hittade 3 uppsatser innehållade ordet grainstone.
1. Chrome spinel grains from the Komstad Limestone Formation, Killeröd, southern Sweden : a high-resolution study of an increased meteorite flux in the Middle Ordovician
Master-uppsats, Lunds universitet/Geologiska institutionenSammanfattning : I mellersta ordovicium var inflödet av kosmiskt material till jorden högre än idag, i sviter-na efter uppbrytningen av den L-kondritiska asteroidkroppen i asteroidbältet mellan Mars och Jupiter, vilket beri-kade den forna havsbottnen med meteoriter och kosmiskt damm. Komstadformationen i Killeröd, Skåne, innehåller ett lager särskilt rikt på L-kondritiska kromitkorn vilket indikerar en hög grad av kondensation. LÄS MER
2. En silurisk transgressiv karbonatlagerföljd vid S:t Olofsholms stenbrott, Gotland
Magister-uppsats, Lunds universitet/Geologiska institutionenSammanfattning : An investigation of carbonate sediments from the upper part of the Slite Beds on Gotland shows that the deposition has occurred in a shallow oxidated marine environments. The sediments in S:t Olofsholms Quarry consist of six different lithologies: 1) Coarse-grained crinoid rudstone, 2) Fine-grained crinoid rudstone, 3) Coarse-grained crinoid grainstone, 4) Fine-grained crinoid grainstone, 5) Floatstone 6) Boundstone The sediments consist for the most part of crinoid fragments of sand to gravel size and were deposited during high energy conditions close to a reef. LÄS MER
3. Petrology and depositional history of the Campanian strata at Maltesholm, Scania, southern Sweden
Magister-uppsats, Lunds universitet/Geologiska institutionenSammanfattning : Campanian sediments of the Maltesholm quarry consist of mostly coarse grained, poorly consolidated, ruditic grainstones, almost free of micrite and lime mud, with interbedded clay horizons. The main constituents of the grainstones are coralline algae and quartz. LÄS MER
