| 21. | The ridge itself is an outcrop of mainly Pliocene / Pleistocene sediments.
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| 22. | The fossils were uncovered from the Miocene to Early Pliocene Andalgala Formation.
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| 23. | It died out at the beginning of Pliocene without leaving any descendants.
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| 24. | Their fossils date back to the Pliocene and Pleistocene epochs.
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| 25. | The Family lived from the Oligocene to the Pliocene before going extinct.
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| 26. | A permanent El Ni�o state existed in the early-mid Pliocene.
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| 27. | Producing units are primarily in the Lower Pliocene Pico Sands.
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| 28. | During Upper Miocene to Pliocene the sea rose and fell several times.
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| 29. | It is known from the early Pliocene of New Zealand.
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| 30. | Pika came at the Miocene-Pliocene boundary from Eurasia.
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