Rock Garden Samples | Trinity University
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Rock Garden Samples

Welcome to the Trinity Geosciences Rock Garden 

Rock Name, Age, Source Locality, and Rock Classification are documented below.

Deformed rhyolite rock1. Deformed rhyolite 

Age: Paleoproterozoic (ca. 1.86 billion years old)

Source Locality: Monico, WI

Classification: Igneous

 

Michigamme Slate rock2. Michigamme Slate

Age: Paleoproterozoic (ca. 1.84 billion years old)

Source Locality: Michigamme, MI

Classification: Metamorphic

 

Castile Gypsum rock3. Castile Gypsum

Age: Permian (ca. 260 million years old)

Source Locality: Delaware Basin, TX

Classification: Sedimentary

 

Wilberns Formation rock4. Wilberns Formation

Age: Cambrian (ca. 490 million years old)

Source Locality: Mason, TX

Classification: Stromatolitic limestone - Sedimentary

 

Baraboo Quartzite rock5. Baraboo Quartzite

Age: Paleoproterozoic (ca. 1.63 billion years old)

Source Locality: Baraboo, WI

Classification: Metamorphic

 

Kona Dolomite rock6. Kona Dolomite

Age: Paleoproterozoic; (ca. 2.2 billion years old)

Source Locality: Negaunee, MI

Classification: Sedimentary

 

7. Graywacke

Age: Paleoproterozoic (ca. 1.5 billion years old)

Source Locality: Wausau, WI

Classification: Sedimentary

 

Wilberns Formation rock8. Wilberns Formation

Age: Cambrian (ca. 490 million years old)

Source Locality: Mason, TX

Classification: Stromatolitic limestone - Sedimentary

 

Graywacke rock9. Graywacke

Age: Paleoproterozoic (ca. 1.76 billion years old)

Source Locality Wausau, WI

Classification: Sedimentary

 

Specular hematite rock10. Specular hematite 

Age: Paleoproterozoic (ca. 1.86 billion years old)

Source Locality: Champion, MI

Classification: Sedimentary (Iron Ore)

 

Hickory Formation rock11. Hickory Formation

Age: Cambrian; (ca. 500 million years old)

Source Locality: Llano Uplift, TX

Classification: Sedimentary (Hematitic sandstone)

 

Mary Ellen Jasper rock12. Mary Ellen Jasper

Age: Paleoproterozoic (ca. 1.86 billion years old)

Source Locality: Biwabik, WI

Classification: Sedimentary

 

Copper Harbor Formation rock13. Copper Harbor Formation

Age: Mesoproterozoic; (ca. 1.05 billion years old)

Source Locality: White Pine Mine, MI

Classification: Sedimentary

 

Town Mountain Granite rock14. Town Mountain Granite

Age: Mesoproterozoic (ca. 1.05 billion years old)

Source Locality: Llano, TX

Classification: Igneous

 

Pahoehoe basalt rock15. Pahoehoe basalt

Age: Holocene (ca. 1500 years old)

Source Locality: Carrizozo, NM

Classification: Igneous

 

Sudbury impact ejecta rock16. Sudbury impact ejecta

Age: Paleoproterozoic (ca. 1.6 billion years old)

Source Locality: Conner’s Creek, MI

Classification: Igneous Sediment

 

Bandelier Tuff rock17. Bandelier Tuff

Age: Pleistocene (ca. 1.7 million years old)

Source Locality: New Mexico

Classification: Igneous

 

Duluth Gabbro rock18. Duluth Gabbro

Age: Mesoproterozoic (ca. 1.1 billion years old)

Source Locality: Duluth, MN

Classification: Igneous

 

Keeweenaw Basalt rock19. Keeweenaw Basalt

Age: Mesoproterozoic (ca. 1.1 billion years old)

Source Locality: Calumet, MI

Classification: Igneous

 

Mellon Gabbro rock20. Mellen Gabbro

Age: Mesoproterozoic (ca. 1.1 billion years old)

Source Locality: Mellen, WI

Classification: Igneous

 

Freda Sandstone rock21. Freda Sandstone

Age: Neoproterozoic (ca. 950 million years old)

Source Locality: Keweenaw Peninsula, MI

Classification: Sedimentary

 

Pabst Conglomerate rock22. Pabst Conglomerate

Age: Paleoproterozoic (ca. 1.85 billion years old)

Source Locality: Gogebic District, WI

Classification: Sedimentary

 

Copper Harbor Conglomerate rock23. Copper Harbor Conglomerate

Age: Mesoproterozoic (ca. 1.05 billion years old)

Source Locality: Eagle Harbor, MI

Classification: Sedimentary

 

Edwards Limestone speleothems rock24. Edwards Limestone speleothems

Age: Quaternary (ca. 50,000 years old)

Source Locality: San Antonio, TX

Classification: Sedimentary

 

Fern Creek Tillite rock25. Fern Creek Tillite

Age: Paleoproterozoic (ca. 2.3 billion years old)

Source Locality: Norway, MI

Classification: Sedimentary

 

Ironwood Iron Formation rock26. Ironwood Iron Formation

Age: Paleoproterozoic (ca. 1.86 billion years old)

Source Locality: Wakefield, MI

Classification: Sedimentary

 

Soudan Iron Formation rock27. Soudan Iron Formation

Age: Archean (ca. 2.7 billion years old)

Source Locality: Soudan, WI

Classification: Sedimentary

 

Gneiss rock28. Gneiss

Age: Archean (ca. 2.8 billion years old)

Source Locality: Central Wisconsin

Classification: Metamorphic 

 

Morton Gneiss rock29.  Morton Gneiss 

Age: Archean (ca. 3.5 billion years old)

Source Locality: Minnesota River Valley, MN

Classification: Metamorphic.

 

Michigamme Slate rock30. Michigamme Slate

Age: Paleoproterozoic (ca. 1.84 billion years old)

Source Locality: Michigamme, MI

Classification: Metamorphic

 

Red Granite rock31. Red Granite

Age: Paleoproterozoic (ca. 1.86 billion years old)

Source Locality: Wausau, WI

Classification: Igneous

 

Ely Greenstone rock32. Ely Greenstone

Age: Archean (ca. 2.7 billion years old)

Source Locality: Ely, MN

Classification: Metamorphic

 

Gneiss rock33. Gneiss

Age: Archean (ca. 2.7 billion years old)

Source Locality: Republic, MI

Classification: Metamorphic