Igneous rock the partial melting of rocks within the mantle and crust. Extrusive igneous rocks cool and solidify quicker than intrusive igneous rocks. They are formed by the cooling of molten magma on the earth's surface. The magma, which is brought to the surface through fissures or volcanic eruptions, solidifies at a faster rate. Hence such rocks are smooth, crystalline and fine-grained. Basalt is a common extrusive igneous rock and forms lava flows, lava sheets and lava plateaus. Some kinds of basalt solidify to form long polygonal columns. The Giant's Causeway in Antrim, Northern Ireland is an example. The molten rock, with
Rock S. Edwards Farmstead Rock S. Edwards Farmstead The Rock S. Edwards Farmstead is a collection of farm buildings located at 3503 Edwards Road (now Sodus Parkway) in Sodus Township, Michigan. It was listed on the National Register of Historic Places in 1995. Rock Savage Edwards was born in 1829 in Shropshire, England. He emigrated to the United States when he was 28, and worked on farms in Ohio and Michigan to save money to purchase his own farm. In 1860, he purchased this farm for $420, likely raising grain for market in nearby Benton Harbor, and soon after planting fruit trees. In 1862,