
1) Appearance of grazing mammals 2) Epoch 3) Epoch with big birds 4) Long-ago epoch 5) Miocene epoch 6) When mammals appeared
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https://www.crosswordclues.com/clue/miocene

1) Epoch
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https://www.crosswordclues.com/clue/miocene

The Miocene n (symbol MI) is the first geological epoch of the Neogene period and extends from about {mya|23.03|5.332} (Ma). The Miocene was named by Sir Charles Lyell. Its name comes from the Greek words μείων (meiōn, `less”) and καινός (kainos, `new”) and means `less recent` because it has 18% fewer modern sea invertebrates...
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http://en.wikipedia.org/wiki/Miocene

An epoch in Earth's history from about 24 to 5 million years ago. Also refers to the rocks that formed in that epoch.
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http://volcano.oregonstate.edu/glossary/1

An epoch in Earth's history from about 24 to 5 million years ago. Also refers to the rocks that formed in that epoch.
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http://www.encyclo.co.uk/local/21455
Mi'o·cene (mī'o*sēn)
adjective [ Greek
mei`wn less +
kaino`s new, fresh, recent.]
(Geol.) Of or pertaining to the middle division of the Tertiary. --
noun The Miocene period. See
Chart of
Geology .
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http://www.encyclo.co.uk/webster/M/71

Miocene (derived from the Greek meion, less, and kainos, recent), in geology, is the name given by Sir Charles Lyell to a subdivision of the tertiary strata relating to a period of about 25,000,000 years ago. The terms Miocene and Pliocene are comparative, the first meaning less recent and the other more recent. The Miocene strata contain fossil pl...
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http://www.probertencyclopaedia.com/browse/HM.HTM

the geological epoch from 26 to 7 million years ago. See time table.
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http://www.seafriends.org.nz/books/glossary.htm

[
n] - from 13 million to 25 million years ago
Found on
http://www.webdictionary.co.uk/definition.php?query=Miocene

Miocene 1. The epoch of geologic time, 24 million to 5 million years ago, during which the modern ocean currents were established and Antarctica became frozen. 2. Etymology: from the mid-19th century. Greek meiōn, 'less' plus kainos, 'recent'.
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http://www.wordinfo.info/words/index/info/view_unit/1315/2
Miocene epoch noun from 25 million to 13 million years ago; appearance of grazing mammals
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https://www.encyclo.co.uk/local/20974

A epoch of the upper Tertiary period, spanning the time between 23.8 and 5.3 million years ago. It is named after the Greek words 'meion' (less) and 'ceno' (new).
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https://www.encyclo.co.uk/local/21202

Fourth epoch of the Tertiary period of geological time, 23.5–5.2 million years ago. At this time grasslands spread over the interior of continents, and hoofed mammals rapidly evolved
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https://www.encyclo.co.uk/local/21221

A geological period 20-10 mya.
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https://www.encyclo.co.uk/local/22658
No exact match found.