Four cores from the Middle Jurassic Bryne Formation of the Lulu-I well in the northernmost part of the Danish Central Trough have been investigated. The cores were slabbed and a detailed description and facies analysis carried out. The cored sequence is very heterogeneous and includes beds of sand-, silt-, claystone, and coal. Seven facies are defined and the sequence is interpreted as sediments of a deltaic interdistributary bay and associated environments overlain by sediments of a coastal environment.