geoscience

#TBT - GeoTimes and the XXI International Geological Congress

July/Aug 1960 Cover of GeoTimes with an etch of Nicholas Steno
For today's #TBT I found the old Geotimes (now EARTH Magazine) cover I picked coincided with the XXIst International Geological Congress, from the 1960 July/August issue. The meeting was held in Copenhagen, and to celebrate this, the Geotimes staff picked an illustration of Niels Stensen, often called by the Latinized form of his name: Nicolaus Steno, (1638-1686). He was born in Copenhagen and is credited for three major concepts in stratigraphy: 1) The Law of Superposition, 2) The Principal of Original Horizontality, and 3) the principal of Lateral Continuity among many other contributions to the geological sciences.

What kinds of hazards are associated with volcanic eruptions?

There are many different kinds of hazards associated with volcanic eruptions, depending on the type of volcano and eruption. Some volcanoes typically produce highly explosive eruptions, such as in the subduction zones of Alaska and the Pacific northwest, and others produce  less energetic eruptions, such as in Hawaii. Therefore, hazards detailed below are not necessarily relevant to every volcano.

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