Abstract: The development of the Frasnian (Upper Devonian) reef complexes of the south-
  ern Timan and Pechora region of northem European Russia is described.  Barrier reef com-
  plexes progressively prograded eastwards during the Frasnian bot the carbonate complexes
  were interrupted many times by regressive events.  Using new conodont and ammonoid bio-
  stratigraphical dating, the timing of reef building episodes has been established which
  enables international correlation with other similar Devonian areas.  Basinal anoxic and
  hypoxic deposits associated with the reef complexes of the Domanik facies provide the
  major hydrocarbon source rocks of the region and the palaeoenvironmental interpretation
  of these is discussed.  Initial transgressions appear to have been associated with the global
  Taghanic Onlap of the late Givetian.  The new level for the base of the Frasnian and Upper
  Devonian lies in the Timan Formation, after the deposition of which marine conditions
  mostly prevailed in the area examined until the late Frasnian when a sharp regression
  occurred with no evidence of the typical Kellwasser facies of Western Europe and other
  areas.  Transgressive pulses initiated ammonoid biofacies in the Regional Sargaev Stage and
  the widespread Timan Event was marked by the spread of Timanites faunas.  A signifikant
  deepening event which initiated the Domanik facies correlates approximately with the
  Middlesex black shale of New York and the main development of the Domanik facies with
  the Rhinestreet black shale of New York.  There are faunal and floral peculiarities of the
  area, shown by endemic genera and rather different ranges of cosmopolitan species than
  elsewhere, which complicates precise international correlation.  Nevertheless, several of the
  main sea-level deepening pulses of the Frasnian, documented in North America, Western
  Europe, North Africa and Australia, are recognizable and these are thought to represent
  eustatic events.