Oils and hydrocarbon source rocks of the Baltic syneclise

Prolific source rock horizons of varying thickness, having considerable areal extent, occur over the Baltic syneclise. Their state of thermal maturity varies from immature in the northeast to peak generation maturity in the southwest. The oil accumulations probably result from pooling of petroleum generated from a number of different source rocks at varying levels of thermal maturity. Hence, no single source for petroleum occurrences in the Baltic synclise may be identified. -from Authors