The Middle to Late Anisian sedimentary succession preserved in the
Klisura quarry in Sirogojno (Zlatibor Mt., SW Serbia) preserves the most
complete deepening depositional history in the Inner Dinarides in Serbia. In
this section, extensional tectonic movements that took place in connection
with the Neo-Tethys break-up are reflected in the exceptional well-preserved
record of the depositional history. The Pelsonian Ravni Formation at the base
of the section is dissected by two generations of neptunian dikes formed in A)
the late Pelsonian, and B) the late Illyrian. Above the late Pelsonian drowning
unconformity a deepening trend of the depositional environment is mirrored
by the litho- and microfacies characteristics of the more than 21 meter thick
red nodular limestones of the Bulog Formation. Periods of starvation with
deposition of Fossillagerstätten beds and hardgrounds mark characteristic
changes in deposition. Two phases of distinct tectonic motions result in
unconformities and a stepwise deepening of the depositional realm. The first
and major unconformity is the drowning surface on the top of the Ravni
Carbonate Ramp which led to the nearly total demise of shallow-water
carbonate production, i.e. the change in deposition from shallow- to deepwater
limestones. The second phase of tectonic motions is expressed by the
formation of an angular unconformity after a phase of starvation in the basin.
No Bulog Limestone section in the Dinarides, even not in the type region near
Sarajevo, preserves all these characteristic sedimentological features as
preserved in the Klisura quarry section in Sirogojno. Therefore this section is
proposed to be the reference section for the sedimentological evolution and
depositional environment reconstruction of the Bulog Formation in the Inner
Dinarides, located in SW Serbia.