21_416M_AllochemSkeletal2_handout

21_416M_AllochemSkeletal2_handout - Temporal Distribution...

Info iconThis preview shows pages 1–8. Sign up to view the full content.

View Full Document Right Arrow Icon
Temporal Distribution of Major Faunal Groups
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Carbonate Producers: Brachiopods Largely ________ , sessile organism; a few species are infaunal Low-Mg calcite superficially look like clams, but that are quite different in their anatomy Common in Paleozoic & Mesozoic shallow marine limestones when they occupied diverse ecologic niches including reefs decimated in the worst mass extinction of all time, the Permo-Triassic event rare in today's neritic environment, but they are fairly common in cold water , either in polar regions or at great depths two shells
Background image of page 2
Carbonate Producers: Brachiopods Two groups: Inarticulates (no hinge structure) vs. articulates (hinge structure) Shell structure: ________ vs. __________
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Temporal Distribution of Major Faunal Groups
Background image of page 4
Carbonate Producers: Echinodermata Modern ocean echinoids inhabit reefal environments & crinoids are restricted to ___________ Echinoids include starfish, sea cucumbers, sea urchins and sand dollars Exhibit ______ symmetry Paleozoic was dominated by crinoids and blastoids Some Paleozoic limestones are made up almost entirely of crinoid and blastoid pieces All blastoids and most crinoids went extinct at the end of the Permian period
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Carbonate Producers: Echinodermata
Background image of page 6
Temporal Distribution of Major Faunal Groups
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 8
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 21

21_416M_AllochemSkeletal2_handout - Temporal Distribution...

This preview shows document pages 1 - 8. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online