Geologists classify metamorphic rocks primarily according to

whether they are foliated or nonfoliated.

whether they contain pseudomorphs.

the percentage of silica.

the size of their crystals

which of the following is a high-grade metamorphic rock?

quartzite

slate

gneiss

schist

the moment magnitude is based on the and of the earthquake.

amplitude; displacement

amplitude; distance

displacement; amount of damage

amount of damage; distance

subduction zones occur at

hot spots

divergent boundaries

transform boundaries

convergent boundaries

how are chalk and chert different?

they have different grain sizes.

they are made of different source materials.

chalk is terrestrial; chert is marine.

chalk is biochemical; chert is chemical.

shorelines migrate during a transgression and during a regression.

seaward; inland

inland; seaward

parallel to the shore; perpendicular to the shore

perpendicular to the shore; parallel to the shore

transform boundaries occur most commonly perpendicular to boundaries in order to break the into segments so as to accommodate motion on a sphere.

convergent; accretionary prisms

convergent; deep ocean trenches

divergent; mid-ocean ridges

divergent; magnetic anomalies