Pridoli Epoch

In the geologic timescale, the Přídolí Epoch (Czech pronunciation: [ˈpr̝̊iːdoliː]) is the uppermost subdivision of the Silurian Period, dated at between 423 ± 2.3 and 419.2 ± 3.2 mya (million years ago). The Přídolí Epoch succeeds the Ludfordian Stage and precedes the Lochkovian, the lowest of three stages within the Lower Devonian geological epoch. It is named after one locality at the Homolka a Přídolí nature reserve near the Prague suburb, Slivenec, in the Czech Republic.^[7] The GSSP is located within the Požáry Formation, overlying the Kopanina Formation. Přídolí is the old name of a cadastral field area.^[8]

Přídolí
423.0 ± 2.3 – 419.2 ± 3.2 Ma PreꞒ Ꞓ O S D C P T J K Pg N ↓
A map of Earth as it appeared 420 million years ago during the Přídolí Epoch
Chronology
−444 — – −442 — – −440 — – −438 — – −436 — – −434 — – −432 — – −430 — – −428 — – −426 — – −424 — – −422 — – −420 — – −418 — Paleozoic O Silurian D Late O Llandovery Wenlock Ludlow Přídolí Early D Rhuddanian Aeronian Telychian Sheinwoodian Homerian Gorstian Ludfordian             ← Lau event ← Mulde event[1] ← Ireviken event[2] Subdivision of the Silurian according to the ICS, as of 2023.[3] Vertical axis scale: Millions of years ago
Etymology
Name formality	Formal
Name ratified	1984
Usage information
Celestial body	Earth
Regional usage	Global (ICS)
Time scale(s) used	ICS Time Scale
Definition
Chronological unit	Epoch
Stratigraphic unit	Series
Time span formality	Formal
Lower boundary definition	FAD of the graptolite Monograptus parultimus
Lower boundary GSSP	Požáry Section, Řeporyje District, Prague, Czech Republic 50.0277°N 14.3249°E / 50.0277; 14.3249
Lower GSSP ratified	1984[4][5]
Upper boundary definition	FAD of the graptolite Monograptus uniformis
Upper boundary GSSP	Klonk, Prague, Czech Republic 49.8550°N 13.7920°E / 49.8550; 13.7920
Upper GSSP ratified	1972[6]

The Šilalė Event, a negative carbon isotope excursion corresponding to an extinction event of conodonts, occurred during the early Pridoli.^[9]

Gondwana during the Přídolí, 420 Ma