ROCKS QUESTIONS AND ANSWERS
Sedimenty-
yCORRECTyANSWERSSolidyparticlesythatyoriginateyfromythey(1)yweathering,ymassywastin
g,yandyerosionyofypreviouslyyexistingyEarthymaterial,y(2)ymineralsyprecipitatedyfromyaysoluti
on,yory(3)ytheyremainsyorytracesyofyonceylivingyorganismsy(plantyoryanimal)yorymaterialyderiv
edyfromytheiryactivities
Clasicysedimentaryyrocky-
yCORRECTyANSWERSIf ysedimentaryyrockyisydominatedybyyweathering,ymassywasting,yan
dyerosionyofypreviouslyyexistingyEarthymaterial
Chemicalysedimentaryyrocky-
yCORRECTyANSWERSIf ysedimentaryyrockyisydominatedybyymineralsyprecipitatedyfromyays
olution
Organicysedimentaryyrocky-
yCORRECTyANSWERSIf ysedimentaryyrockyisydominatedybyyremainsyorytracesyofyonceylivin
gyorganismsy(plantyoryanimal)yorymaterialyderivedyfromytheiryactivities
Bedsy-
yCORRECTyANSWERSSedimentynormallyyaccumulatesyinylayersyofycohesionylessyparticle
s
Gravely-yCORRECTyANSWERSclasticyparticlesygreaterythany2ymmyinysize
Sandy-yCORRECTyANSWERSclasticyparticlesybetweeny0.0625ymmyandy2.0ymmyinysize
Silty-
yCORRECTyANSWERSsmallerythanysandyandyincludesygrainsybetweeny0.0035ymmyandy0.
0625ymm
Clayy-yCORRECTyANSWERSsmallestyandyincludesyallyparticlesylessythany0.0035ymm
Mudy-yCORRECTyANSWERScategorizingyallyparticlesylessythany0.0625ymm
Conglomeratey-yCORRECTyANSWERSGravel
Brecciay-yCORRECTyANSWERSIfygravelyisyangularyoryblockyyinyform
Sandstoney-yCORRECTyANSWERSSand
Siltstoney-yCORRECTyANSWERSSilt
Claystoney-yCORRECTyANSWERSClay
Mudstoney-yCORRECTyANSWERSSilty+yclay
2.0y-y1.0ymmy-yCORRECTyANSWERSVeryycoarse
0.5y-y1.0ymmy-yCORRECTyANSWERSCoarse
0.25y-y0.5ymmy-yCORRECTyANSWERSMedium
0.125y-y0.25ymmy-yCORRECTyANSWERSFine
0.0625y-y0.25ymmy-yCORRECTyANSWERSVeryyfine
Chemicalysedimentaryyrocksy-
yCORRECTyANSWERSComposedyofyparticlesyderivedyfromyorganismsyorytheiryactivitiesyo
ryareyderivedyfromyparticlesyprecipitatedyfromysolution
Examplesyofychemicalysedimentaryyrocksy-
yCORRECTyANSWERSCarbonates,yevaporites,ycherts,yandycoals
Limestoney-yCORRECTyANSWERS-
yComposedyofycalciteymixedywithyvaryingyproportionsyofyorganicydebris
-yMostycommonycarbonateyrock