Welcome to

Medfield(…a seemingly peaceful town)

…but a crime’s been committed!!

REMEMBER…In the Early Paleozoic Era, North

America was…

…covered by oceans!!

Throughout the Paleozoic, North America is pushed up and out of the oceans and the

continents merge to form the super-continent…

PANGAEA!!

The supercontinent begins to break apart and head to our modern-day continental

positions in the Age of Reptiles…

…the Mesozoic Era!!

So, in the Cenozoic Era, we can expect that the continent of North America,

which used to be the ocean floor, would be mostly…

…Sedimentary Rock!!!

Hardness Test

Streak Test

Streak Test

Cleavage & Fracture Test

Cleavage & Fracture Test

Cleavage & Fracture Test

Cleavage & Fracture Test

Galena

Hornblende

Halite

Calcite

Biotite

Muscovite

Gypsum

Greater than 3

Diorite(igneous intrusive)

3 or less

Color

None/white

Color

None/white

120/60

120/60

90/90

90/90

flakes

flakes

180 1 direction

Sulfide Ore(igneous intrusive)

Rock Salt(Sedimentary chemical)

Limestone(Sedimentary organic)

Pagioclase (Igneous extrusive)

Muscovite schist (Metamorphic)

Gypsum (Sedimentary chemical)

What type of rock is Diorite?

IGNEOUS!!!

So, the sedimentary rock must have been…

STOLEN!!!

DioriteGraniteRhyolitePink Granite

WIND

Let’s examine the evidence:

High Elevations

20 milesGlaciersRunning Water