Welcome to the 33th Daily Field Note! Here you find the top post of the day, one covering each scientific field that is included by Geopolis. Since these authors put a lot of effort in writing a good post they surely deserve the extra exposure.

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Subjects curated by Geopolis are Geography, Anthropology, Ecology, Geology, Archeology and certain branches of History.

Geology: Classification of Pyroclastic Rocks

@sooflauschig already wrote a post about the classification of igneous rocks. Today he wrote a similar, but nonetheless interesting article on pyroclastic rocks. It is very informative so you can check it out if you need more information on the subject.

Original Post

While plutonic rocks look relatively alike , volcanic rocks can look vastly different from each other, depending on their origin. Volcanism creates different types of materials: pyroclastic rocks and solid rocks. Solid volcanic rocks form from magma or from lava . The outflowing of lava requires calm and volatile poor volcanic activity. _Pyroclastic rocks_ though are formed by highly energetic, volatile rich, explosive eruptions. The spontaneous volume increase of gas caused by decompression during ascend from the interior of the Earth literally tears apart the surrounding melt and catapult them away from the crater. Because of their form of deposition they fall partly into the realm of...

Anthropology: Communication : Final Part - Language in Sociocultural and Cross-Cultural Communication

Today @zest tackled the field of language in his series on communication. It is always nice to read his posts as they really go in depth on subjects that might seem so common.

Original Post

Speaking styles vary according to the situation. Teenagers, for instance, would use different words and ways of speaking when addressing their fathers and peers. Differences in social status are also indicated by speaking styles, especially where, as in specialised societies, these differences are accompanied by differences in levels of education. There is, for instance, a close link between language usage and issues such as hierarchy and power.

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