Jones Ridge Limestone Formation
30 distinct taxa, from 47 fossil occurrences the Paleobiology Database records under this name.
The Paleobiology Database files this name in 2 countries. That can be one body of rock crossing a border, or two rocks that happen to share a name. The database does not say which, so nothing below is added across them.
Alaska · US
22 taxa · 39 fossils · 497–487 MyaMembers recorded: Lower.
Macrostrat dates this rock 513–390 Ma. Macrostrat’s own record
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3 distinct localities, where the rock is now rather than where it was laid down. Tectonics draws the world it belonged to.
When
What has been found
- Quebecaspis
- Cheilocephalus
- Tholifrons
- Cernuolimbus arcticus
- Dunderbergia
- Elburgia
- Iddingsia relativa
- Oncagnostus tumidosus
- Pseudagnostus communis
- Sigmocheilus compressus
- Acmarhachis acutus
- Cernuolimbus
- Dytremacephalus
- Hardyoides
- Homagnostus
- Homagnostus alaskensis
- Iddingsia
- Olenaspella evansi
- Oligometopus breviceps
- Pterocephalia constricta
- Quebecaspis conifrons
- Tholifrons minuta
Yukon · CA
8 taxa · 8 fossils · 450–443 MyaMembers recorded: Upper.
Macrostrat dates this rock 513–390 Ma. Macrostrat’s own record
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1 distinct localities, where the rock is now rather than where it was laid down. Tectonics draws the world it belonged to.
When
What has been found
What else lived thenRank the rock of a period
Counts are of occurrence records, which measure the rock and the fieldwork together.