EGU-Sea-level changes quizz

How would you define Quaternary?

As the time period...

• from 1 million years ago to today

• from 2.5 million years to 1 million years ago

• from 2.5 million years ago to today

How would you define Holocene?

As the time period...

• from 11 thousand years ago to today

• from 1 million years ago to today

• from 1 million to 11 thousand years ago

• from 2.5 million to 11 thousand years ago

During the Quaternary, the sea-level:

• has remained relatively stable.

• is rising, due to the melting of the glaciers.

• is falling, due the creation of glaciers.

• fluctuated, due to the periodical creation and melting of the glaciers.

When the glaciers melt, the sea-level:

• remains stable.

• rises.

• falls.

Which factor affects the global sea-level changes?

• Eustasy

• Isostasy

• Tectonics

• All the above

• None of the above

Which factor(s) could affect the local sea-level?

• Tectonics

• Isostasy

• None of the above

• All the above

Beachrocks usually form:

• below the mean sea-level, but above the high tide.

• above the mean sea-level, but below the high tide.

• near the mean sea-level.

• at any level between the high and low tide.

Check this out! A quarry in Greece! But why is it submerged?

• Apparently, it was hit by a tsunami in the past.

• Because that's where the ancients found the rock they needed to extract.

• Because the sea-level is rising today, due to the melting of the glaciers, but it could also be due to slight tectonic subsidence.

• The sea-level is rising today due to the melting of the glaciers, but this did not affect this area, as it did not have any glaciers. So, this is submerged due to slight tectonic subsidence.

What are beachrocks?

• Pebbles or cobbles of any type found on a beach.

• Rocks of any type found on a beach.

• Reefs of any type found near the shore

• Rocks that have been created by the cohesion of coastal material

By studying a tidal notch, how can we understand if the vertical tectonic movements were gradual or were attributed to earthquakes (and were rapid)?

• Actyally we can't.

• We must measure its width.

• We must measure the local tidal range.

• We must measure its width and the local tidal range.