Silfra Fissure and Its Geology

Where is Silfra Fissure located?

• Greenland

• Canada

• Iceland

• Norway

What is the Mid-Atlantic Ridge?

• A mountain range in Asia

• A spreading center between tectonic plates

• A river in Europe

• A desert in Africa

Why is Iceland geologically active?

• It is located on a volcanic hotspot

• It has a large desert

• It is covered in ice

• It is near the equator

What makes Silfra Fissure popular among tourists?

• Its proximity to a city

• Its warm climate

• The ability to touch two tectonic plates

• Its historical buildings

What is a significant environmental concern at Silfra Fissure?

• Disturbance of biofilms

• Deforestation

• Noise pollution

• Air pollution

What are biofilms?

• Layers of ice

• Underwater plants

• Thin layers of microbes

• Types of fish

Why is the ecosystem at Silfra Fissure unique?

• It is based on phytoplankton

• It relies on groundwater from glacier melt

• It has a tropical climate

• It is located in a desert

What percentage of divers disturb the biofilms at Silfra?

• 100%

• 91.4%

• 75%

• 50%

What is an alternative diving site to Silfra?

• Nesgjá

• Reykjavik

• Geysir

• Vatnajökull

What historical significance does Þingvellir National Park hold?

• It was the site of Iceland’s first parliament

• It was a royal residence

• It was a Viking battleground

• It was a medieval trade center