Flooding the Black Sea Flashcards
1
Q
In what kind of climate is oxygen-18 enriched?
A
colder climates/oceans
2
Q
Despite global rise in sea levels, where is sea level decreasing? why?
A
- stockholm, Sweden
- Scandinavia recently deglaciated –> REBOUNDING
3
Q
Which flood does the Epic of Gilgamesh and noah’s Arc describe?
A
flooding of the Black Sea
4
Q
How did the Black Sea form?
A
- Mediterranean sea levels rising
- pushed channel through what is now the Bosphorus
- seawater poured in at about 200 times the volume of Niagara Falls; submerging shoreline
5
Q
At what rate was the Black Sea widening, during the flood?
A
one mile/day
6
Q
What evidence was essential to the idea of the abrupt flooding of the Black Sea?
A
- high resolution seismic-reflection profiles: sharp break in black sea sediment, removed by rushing water –> SHELF EDGE DELTAS
- cores targeted on these profiles: algae, mud cracks, shrub roots in place
- dating by 14C accelerator mass
7
Q
TRUE or FALSE: sea levels were very high at the time of the delta deposits in the Black Sea
A
FALSE –> low sea levels
8
Q
What is the best evidence for black sea flooding?
A
Strontium
9
Q
When did an abrupt transofrmation to modern ocean compositions occur?
A
8,400 years ago
