Thread by @MiningNS

The difference between islands and hills is whether there's water around them!
#Halifax harbour was mostly dry land after the last ice age ended 10,000 years ago - a couple lakes and a stream that ran from the #SackvilleRiver to the sea.
#nspoli #cbpoli #novascotia #capebreton

Georges became an island as rising seas filled the harbour, a process completed 5700 years ago. Sea levels are lower during ice ages because so much water is frozen in glaciers, and sea levels rise as glaciers melt.
#nspoli #cbpoli #novascotia #capebreton

In this picture you can see some of the submerged area of #GeorgesIsland. Imagine the harbour is dry land. Georges would just be a hill like any other.
#nspoli #cbpoli #novascotia #capebreton #halifax

#Halifax's harbour islands, including Georges, are drumlins - rocks, gravel, sand and clay left by glaciers 10,000-70,000 years ago when Nova Scotia was covered by glaciers several kilometres thick.
#nspoli #cbpoli #novascotia #capebreton

The word drumlin comes from the Gaelic word druim, meaning “rounded hill,” or “mound.”
Georges Island was occupied by military forces for 200 years from 1750, acting as a key fortification protecting #Halifax.
#nspoli #cbpoli #novascotia #capebreton