Siljan Ring Siljan Ring The Siljan Ring () is a prehistoric impact crater in Dalarna, central Sweden. It is one of the 15 largest known impact craters on Earth and the largest in Europe, with a diameter of about . The impact that created the Siljan Ring occurred when a meteorite collided with the Earth's surface during the Devonian period, about 376.8 ± 1.7 Ma. This coincides around the first Devonian extinction, the Kellwasser Event or Late Frasnian extinction at 376.1 Ma ± 1.6 Ma. The effects of the impact can clearly be seen in the bedrock in the area. The Cambrian,
Mora (linguistics) "heavy" foot and a ""laghu"" / "light" foot. The reason is that the conjoined consonants 'rt' render the normally light 'ka' syllable heavy. Mora (linguistics) A mora (plural "morae" or "moras"; often symbolized μ) is a unit in phonology that determines syllable weight, which in some languages determines stress or timing. The definition of a mora varies. In 1968, American linguist James D. McCawley defined it as "something of which a long syllable consists of two and a short syllable consists of one". The term comes from the Latin word for "linger, delay", which was also used to translate the