Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Great Barrier Reef' has mentioned 'Sea level' in the following places:
Occurrence Sentence Text Source
[25]:27 The Great Barrier Reef's development history is complex; after Queensland drifted into tropical waters, it was largely influenced by reef growth and decline as sea level changed.
10 million years ago, the sea level significantly lowered, which further enabled sedimentation.
At around that time, sea level was 120 metres (390xc2xa0ft) lower than it is today.
From 20,000 years ago until 6,000 years ago, sea level rose steadily around the world.
By around 13,000 years ago the sea level was only 60 metres (200xc2xa0ft) lower than the present day, and corals began to surround the hills of the coastal plain, which were, by then, continental islands.
As the sea level rose further still, most of the continental islands were submerged.
Sea level here has not risen significantly in the last 6,000 years.