1 / 12

Laggerstatten

Laggerstatten. defined. Soft parts. Classic Examples. Ediacara when: Neoprot where: Ediacara SA Mistaken Pt. Newf Namibia how: v. shallow marine impressions in well sorted sandstone what: earliest metazoans

cassie
Télécharger la présentation

Laggerstatten

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Laggerstatten defined Soft parts Classic Examples Ediacara when: Neoprot where: Ediacara SA Mistaken Pt. Newf Namibia how: v. shallow marine impressions in well sorted sandstone what: earliest metazoans Vendian fauna Cnidaria, Protoarthropods? Delicate hard parts Abundance Diversity Importance Firsts anatomy & functionl morph. phylogeny

  2. Laggerstatten Classic Examples Gun Flint Chert when: Archean where: Canada how: marine siliceous ooze altered to chert what: single cell, prokaryotes

  3. Laggerstatten Classic Examples • Burgess Shale • when: Middle Cambrian • where: Banf BC • how: shelf edge slump into • deep anoxic basin • hard & soft tissue replaced by pyrite • what: great diversity • most phyla represented • great diversity & disparity

  4. Laggerstatten Classic Examples • Xiang Chen • when: Early Cambrian • where: Central china • how: shelf edge slump into • deep anoxic basin • hard & soft tissue replaced by pyrite • what: great diversity • first occurrence of many groups • great diversity & disparity • Embyos

  5. Laggerstatten Classic Examples Hunsruck Shale when: Devonian where: Germany how: deep anoxic basin hard & soft tissue replaced by pyrite what: Echinoderms Other

  6. Laggerstatten Classic Examples Mazon Creek when: Pennsylvanian where: Illinois how: siderite nodules in shale formed around individuals molds/replacement/carbonization what: Estuary to shallow marine plants, inverts., high diversity tully monster

  7. Laggerstatten Classic Examples Solenhofen Limestone when: Jurassic where: Germany how: v. shallow marine, hyper saline detailed molds replacement by ? what: Terrestrial to shallow marine plants, inverts., high diversity archaeopteryx

  8. Laggerstatten Classic Examples Green River & Florissant when: Eocene where: Co, Ut, Wy how: anoxic lake sediments v. detailed molds replacement by silica what: Terrestrial and fresh water fish! plants! insects!

  9. Laggerstatten Classic Examples Baltic Amber, Dominican Amber when: where: Co, Ut, Wy how: tree sap what: Terrestrial invert & vert. plants insects

  10. Laggerstatten Classic Examples LaBrea Tar Pits when: Pleistocene where: down town LA how: encased in petroleum seep what: Terrestrial vert. saber tooth tiger insects

  11. Laggerstatten Classic Examples Future? Gray Fossil Site when: Miocene where: Gray TN how: sink hole anoxic lake unaltered, & replaced what: Terrestrial vert. invert. great abundance

  12. Laggerstatten Many Small scale but v. impt. Examples “Fame” if you recognize one. Small deposit within a single quarry: Cambrian - Kangroo Island Silurian - Wakashaw Wisconsin Pennsylvanian - Humboldt Kansas

More Related