Shop Windows to the Universe

Dig into Montana Before History: 11K Years of Hunter-Gatherers in the Rockies and Plains by D. H. MacDonald, Ph.D. See our online store book collection.
The Rover studies Barnacle Bill.
Click on image for full size
Image from: NASA/JPL

Barnacle Bill

Barnacle Bill was the first rock to be explored by the Rover. It was found north by northwest of the Mars Pathfinder lander.

Barnacle Bill was a dark rock, which means it is probably of basaltic or andesitic basalt origin. It had many small holes over its surface (vesicles) but otherwise did not appear to be well weathered. These features help scientists figure out the possible origin of Barnacle Bill. Barnacle Bill might possibly have been put in place by flowing water. Rocky outcroppings 30 km away also seem to be made of basalt or andesitic basalt. On the other hand, Barnacle Bill might be left over from the formation of the nearby crater called "Big Crater".


Shop Windows to the Universe Science Store!

Our online store includes issues of NESTA's quarterly journal, The Earth Scientist, full of classroom activities on different topics in Earth and space science, ranging from seismology, rocks and minerals, oceanography, and Earth system science to astronomy!

Windows to the Universe Community

News

Opportunities

You might also be interested in:

Cool It! Game

Check out our online store - minerals, fossils, books, activities, jewelry, and household items!...more

An Overview of the Mars Pathfinder Mission

The Mars Pathfinder (MPF) mission was sent to investigate the geology of Mars. Its principal objective was to analyze the rocks and soil of Mars. The MPF consisted of 2 components, a lander and a mobile...more

Classes of Martian Rock

The rocks explored by the Mars Pathfinder's Rover have been classified into three kinds by scientists analysing the Rovers' findings. Potentially the rocks may all be the same kind of rock, all having...more

Basalt Rocks

Basalt is a hard, black extrusive igneous rock. It is the most common type of rock in the Earth's crust and it makes up most of the ocean floor. The prevalence of dark minerals such as pyroxene and olivine...more

Rock weathering on Mars

The rocks explored by the Mars Pathfinder's Rover are classified into two groups according to how they weather. Differing weathering properties may indicate differing conditions of deposition because impact...more

Mars Odyssey

The Mars Odyssey was launched April 7, 2001, from Cape Canaveral Air Force Station in Florida. After a six-month, 285 million-mile journey, the Odyssey arrived at Mars on October 24, 2001 (02:30 Universal...more

Mars 2005

The Mars 2005 mission is still in the planning stages. It is set to launch in the year 2005. ...more

Aerobraking

On September 12, 1997, the Mars Global Surveyor successfully entered a highly elliptical orbit around Mars. To get into the near-circular, near-polar, low-altitude orbit necessary to map the surface of...more

Windows to the Universe, a project of the National Earth Science Teachers Association, is sponsored in part is sponsored in part through grants from federal agencies (NASA and NOAA), and partnerships with affiliated organizations, including the American Geophysical Union, the Howard Hughes Medical Institute, the Earth System Information Partnership, the American Meteorological Society, the National Center for Science Education, and TERC. The American Geophysical Union and the American Geosciences Institute are Windows to the Universe Founding Partners. NESTA welcomes new Institutional Affiliates in support of our ongoing programs, as well as collaborations on new projects. Contact NESTA for more information. NASA ESIP NCSE HHMI AGU AGI AMS NOAA