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1 500 million years – 1.5 kilometres First algae evolve, when a photosynthetic cyanobacteria is taken inside of an early eukaryotic cell. These cyanobacteria develope… Read More »First algae

1 600 million years – 1.6 kilometres Large magmatic rapakivi granite intrudes extensive parts of the upper crust in the Fennoscandian area. The marker-stones of… Read More »Rapakivi granite

1 700 million years – 1.7 kilometres The continents gather together and form the Columbia supercontinent 1.8 – 1.5 billion years ago. Supercontinents A supercontinent… Read More »The Columbia supercontinent

1 800 million year – 1.8 kilometres There is a rapid local rise of the Earth’s crust in the Fennoscandian shield. Shear- and fault zones… Read More »Rifting in Southern Finland

1 834 million years – 1.83 kilometres The Saramantia continent from the south and the Amazonian continent from the west collide with the main Karelides… Read More »Minerals metamorphose

1 860 million years – 1.7 kilometres The motion of lithosphere plates changes directions causing a stretching motion that forms large sedimentary basins in Finland.… Read More »Rifting in Finland

1 880 million years – 1.9 kilometres Micro-continents and island arcs collide in Finland. The collision is called the Fennian orogeny, and it forms the… Read More »The bedrock in Southern Finland forms

1 900 million years – 1.9 kilometers Southern Finland has active volcanic island arcs, with activity similar to the current volcanism in the Philippines. The… Read More »Volcanic islands in Southern Finland

2 200 million years – 2.2 kilometres The oxygen produced by cyanobacteria or ’blue-green algae’ is accumulating into the atmosphere and causes the mass extinction… Read More »The oxygen revolution and Eukaryotes

2 300 million years – 2.3 kilometres The great oxygenation event is taking place. Oxygen produced by cyanobacteria or ’blue-green algae’ oxidizes methane in the… Read More »Oxygen revolution and the snowball Earth