L13_Nonskeletal Grains_Key

L13_Nonskeletal Grains_Key - shelter 3. poor permeability...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Lab 13 KEY NONSKELETAL GRAINS Sample 1 1. ooids 2. ooid grainstone 3. not quite, some are ellipsoidal 4. wave action, shape of nucleus Sample 2 1. pisoids 2. diameter > 2mm 3. pisoid grainstone 4. peritidal / tidal flat Sample 3 1. peloids 2. micritized, no internal structure 3. peloidal grainstone Sample 4 1. peloids 2. peloidal packstone 3. hydraulic sorting, gravity settling, dune processes?? Sample 5 1. ooids 2. ooid grainstone 3. high energy: shoal, tidal delta, tidal bar or beach Sample 6 1. intraclast 2. peloidal grainstone 3. peloidal packstone 4. trough cross bedding 5. SKIP Sample 7 1. ooids 2. ooid grainstone 3. high-energy, shallow marine Sample 8 1. intraclasts 2. unlithified clasts of carbonate mud are transported short distances and deposited 3. low-energy with periodic high-energy events (like storms or slides) POROSITY Sample 9 – New Mexico water treatment plant product 1. intergranular
Background image of page 1

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

View Full DocumentRight Arrow Icon
2. ooids 3. ooid grainstone Sample 10 1A. geopetal (originally intragranular) 2B.
Background image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: shelter 3. poor permeability isolated pores Sample 11 1. fenestral 2. respiration of organisms, decomposition, compaction Sample 12 1. moldic 2. gastropods and bivalves 3. aragonite dissolves readily, oysters - original calcite still remains SEDIMENTARY STRUCTURES Sample 13 1. mudcracks (and imbrication?) 2. subaerial exposure (i.e. tidal flat), flow direction from imbrication 3. intraclasts Sample 14 1. some 2. bioturbation destroyed Sample 15 1. stylolites 2. pressure dissolution 3. carbonates - dissolve easier Sample 16 1. brecciated 2. dissolution of evaporates solution collapse 3. carbonates dissolve easier Sample 17 1. imbrication 2. current oriented grains 3. intraclasts 4. intraclast packstone Sample 18 1. mudstone? and boundstone 2. low and high Sample 19 -SKIP Supplemental Questions Look up in Text...
View Full Document

Page1 / 2

L13_Nonskeletal Grains_Key - shelter 3. poor permeability...

This preview shows document pages 1 - 2. Sign up to view the full document.

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