The point map shows samples of the BGR-petroleum archive, which are stored at the Federal Institute for Geosciences and Natural Resources (BGR). The map contains drill sites and selected information on the well including well names and NIBIS-well identifiers (NIBIS Kartenserver des Landesamtes für Bergbau und Geologie Niedersachsens). Petroleum samples are stored in different quantities and are usually stored cool. For many of the samples geochemical data are available at BGR like relative amounts of aliphatic and aromatic hydrocarbons, isotopic compositions of individual fractions (delta13C) as well as ratios of selected aliphatic hydrocarbons and biomarkers (particularly steranes and hopanes). Samples and data are stored for internal use only due to legal issues. BGR may help with making a contact.