The ridges running across this Kazakhstan landscape are a result of displacement on an active fault. Credit: Tim Middleton. (c) Geology for Global Development
Friday Photo (59): Active Geology – Icelandic Geyser
These two images show an Icelandic geyser when calm (top) and then when ‘erupting’ (Bottom). Historical reports associate increased activity in the geysers with earthquakes. (c) Geology for Global Development
Friday Photo (58): Active Geology – Striations on a Fault Surface, Greece
An active fault surface in Greece – one of the most seismically active places on Earth. The striations on the surface can be used to measure the direction of movement on the fault. The exposed surface can be dated at various heights (using dating systems such as Beryllium-10) to infer the rate of slip. (c) Geology for Global Development
Friday Photo (57): Active Geology – Sinking Buildings from Ancient Greece
These foundations were once part of a building in ancient Greece. Over thousands of years, active faults have lowered the land and the foundations have sunk below sea level. Geology can have a big impact on relatively short timescales. (c) Geology for Global Development