midterm lab2
Geology 101 with Yancey at Texas A&M University
About this deck
By: baffour boakye
Textbook:
Earth: An Introduction to Physical Geology (9th Edition)
Created: 2009-10-05
Size: 31 flashcards
Views: 22
Textbook:
Earth: An Introduction to Physical Geology (9th Edition)Created: 2009-10-05
Size: 31 flashcards
Views: 22
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decomposititon or dissolution of earth materials
chemical weatheringEnter Answer...
the cracking, scratching, crushing, abrasion, or other physical disintegration of earth materials
physical (mechanical ) weathering
loose grains and chemical residues of rocks, minearals, plants, or animals)
sediments
mixtures of water and other chemcials formed by the dissolution and chemcial decay of rocky or organic materials
aqueous solutions
form when sediments are compressed together otherwise hardened
sedimentary rocks
usually expressed in wentworth classes, named after C.K. Wentworth
grain size
includes grains larger than 2 mm in diameter ( granules,pebbles,cobbles, and boulders)
gravel
includes grains from 1/15mm to 2mm in diameter
sand
includes grains from 1/256 mm to 1/16 m in diameter
silt
includes grains less than 1/256 diameter .
clay
clearly visible crystals
crystalline texture
crystals to small to identify
microcrystalline texture
sediments and rocks are comprised mostly of the remains of organism , such as shells, plant fragments, and carbon
biochemcial (bioclastic)
comprised mostly of intergrown mineral crystals preciptated from aqueous solutions and chemical residues
chemical sediments
rubbing or wearing away
detrital
detrital sediments and rocks are referred to as
siliciclastic
pressure hardened
compacted
glued together by tiny crystals
cemented
strata
layers of sediment
surfaces btw strata are called what planes
bedding planes
inclined stratification is called
cross-stratification, or corss bedding
sediment transported in a single direction by water or air currents commonly forms what
current ripple marks
sediment transported by back and forth water motions or very gentle waves simmin the bottom of a lake or ocean commonlyh forms what
oscillatory ripple marks
sequence of cross-strata inclined in oposite directions are called
bimodal crossbedding
sorted from coarse at bottom to fine at the top
graded
scoop -shaped or v shaped depressions scoured into a sediment suface by the erosional, winnowing action of currents
flutes
natural casts of flutes are calld
flute casts
form while mosit deposits of mud dry and shrink
mud cracks
traces of former life are called
trace fossils
also known as any evidence of prehisotric life
fossils
information gained from grain characteristics, sedimentary stuructures, and fossils can be used to infer what ancient environements
paleoenvironments
About this deck
By: baffour boakye
Textbook: Earth: An Introduction to Physical Geology (9th Edition)
Created: 2009-10-05
Size: 31 flashcards
Views: 22
Textbook:
Earth: An Introduction to Physical Geology (9th Edition)Created: 2009-10-05
Size: 31 flashcards
Views: 22
About StudyBlue
STUDYBLUE makes things that make you better at school.
Things like online flashcards with photos and audio.
Things like personalized quizzes and friendly reminders about when (and what) to study next.
Think of it as a digital backpack™: access to all of your study materials online and on your phone.
STUDYBLUE exists to make studying efficient and effective for every student, for free. Join us.
“I have used this website for three exams, and I see a huge difference in my test results.”
Naj
Naj