Fig. 3. Indicators of abrupt environmental change in sediment cores from deep basin (left ) and shallow shelf (right ) regions of the Black Sea. The horizontal bold gray line at 7,150 kybp marks a time of simultaneous change in many properties of the sediments
Columns:
A) lithostratigraphic units (Degens and Ross, 1972).
B) predominant lithology (Ross, Degens et al., 1970).
C) dinoflagellate abundance (Wall and Dale, 1974) Lingulodinium machaerophorum (1), Peridinium claudicans (2),Spiniferites bulloides (3), Tectatodinium psilatum (4) and Spiniferites cruciformis (5).
D) diatom abundance in a core at -920 m depth (Shimkus, Mukhina et al., 1973).
E) location of fresh (F), brackish (B) and marine (M) diatom specimens in cores below -2000 m depth (Mayard, 1974).
F) percent organic carbon (Ross, Degens et al., 1970).
G) 13 C/ 12 C ratio (o/oo) in the carbonate fraction (Deuser, 1972).
H) 18 O/ 16 O ratio (o/oo) in the carbonate fraction (Deuser, 1972).
I) Sedimentation rate (cm/kyr) (Degens and Ross, 1972).
J) calculated percent fraction of reworked detritus (Deuser, 1972).
K) stratigraphic nomenclature (Shimkus, Emelyanov et al., 1975).
L) predominant lithology (Kuprin, Scherbakov et al., 1974; Nevesskaya, 1965; Scherbakov, 1983; Shimkus, Emelyanov et al., 1975).
M) stratigraphic range of selected mollusk species in our core AK93-1 at -68 m depth (Major, 1994).
N) percent organic carbon in our core AK93-11 at -91 m depth.
O) percent water content in our core AK93-11.
P) 18 O/ 16 O ratio (o/oo) measured on Cardium edule from core AK93-1 for the Old and New Black Sea sediments and on Dreissina rostriformis in core AK93-13 at -165 m depth for the Neoeuxine sediments (Major, 1994).
Q) synopsis of geometry of clinoforms seen in the high-resolution seismic reflection profiles across the outer shelf.