Mount St. Helens, Washington Collecting Dome Rocks Images 2004 to Current
Current Eruption Menu Menu of Images Crater/Dome/Eruption Images Field Crews/Work Images Repeat/Annotated Images News/Media/Miscellaneous Images Collecting Dome Rocks Images June 22, 2006, top of Extrusion 4 ... April 28, 2006 ... February 15, 2006 ... August 19, 2005 ... July 13, 2005 ... February 22, 2005 ... January 3, 2005 ... November 4, 2004 ... October 27, 2004 ... October 20, 2004 ... Dome Rock Thin Sections - Comparing 1986 to 2004 ... Information click on thumbnail for "user-friendly" medium-size image ... medium-size images are around 100 K and best for web viewing ... large-size images are 2-6 M, no logo, 200-300 dpi, 8x10 to 9x12 size, and best we have for printing ... "print ready" images are at approximately 8x10 size, dpi varies, for the printer, 2-3M, with date and logo. MEDIA NOTE --- Use "large-size" images ... they are the best resolution available ... no logo ... they are the size shot on the camera ...
Collecting Dome Rocks
On Top of the Dome at Extrusion 4
	MSH06_new_dome_from_east_06-22-06_annotated_med.jpg ANNOTATED: Mount St. Helens new dome as seen from the east. Current Extrusion #7 is within turquoise circle, Extrusion #4 which erupted between December 2004 and April 2005, is within the large orange circle, and the snowbank landing spot of June 22, 2006 is within the small yellow circle. USGS Photograph taken on June 22, 2006, by Julie Griswold. [annotated image] ... [non-annotated, medium size] ... [non-annotated, large size]
	MSH06_helicopter_landing_extrusion4_06-22-06.jpg Helicopter landing on snowbank in the graben at Extrusion 4. Extrusion 4 erupted between December 2004 and April 2005. USGS Photograph taken on June 22, 2006, by John Pallister. [medium size] ... [large size]
	MSH06_helicopter_over_landing_spot_extrusion4_06-22-06.jpg Helicopter landing on snowbank in the graben at Extrusion 4. Extrusion 4 erupted between December 2004 and April 2005. USGS Photograph taken on June 22, 2006, by John Pallister. [medium size] ... [large size]
	MSH06_USGS_scientist_walking_on_extrusion4_06-22-06.jpg USGS scientist walking on snowbank on Extrusion 4 of Mount St. Helens' dome, with the current extrusion - Extrusion 7 - in the background on left. Extrusion 4 erupted between December 2004 and April 2005. USGS Photograph taken on June 22, 2006, by John Pallister. [medium size] ... [large size]
	MSH06_USGS_scientist_extrusion4_extrusion7_06-22-06.jpg USGS scientist climbing section of Extrusion 4 of Mount St. Helens' dome, with the current extrusion - Extrusion 7 - in the background. Extrusion 4 erupted between December 2004 and April 2005. USGS Photograph taken on June 22, 2006, by Dave Sherrod. [medium size] ... [large size]
	MSH06_USGS_scientist_in_jumble_extrusion4_06-22-06.jpg USGS scientist climbing section of Extrusion 4 of Mount St. Helens' dome. Extrusion 4 erupted between December 2004 and April 2005. USGS Photograph taken on June 22, 2006, by Dave Sherrod. [medium size] ... [large size]
	MSH06_USGS_scientist_collecting_sample_extrusion4_06-22-06.jpg USGS scientist collecting rock sample from Extrusion 4 of Mount St. Helens' dome. Extrusion 4 erupted between December 2004 and April 2005. USGS Photograph taken on June 22, 2006, by Dave Sherrod. [medium size] ... [large size]
	MSH06_USGS_scientist_collecting_samples_extrusion4_06-22-06.jpg USGS scientist collecting rock samples from Extrusion 4 of Mount St. Helens' dome. Extrusion 4 erupted between December 2004 and April 2005. USGS Photograph taken on June 22, 2006, by Dave Sherrod. [medium size] ... [large size]
	MSH06_USGS_scientist_examines_section_of_extrusion4_06-22-06.jpg USGS Scientist examines deposits (mostly iron compounds) of section of the Spine from Extrusion 4. Extrusion 4 erupted between December 2004 and April 2005. USGS Photograph taken on June 22, 2006, by John Pallister. [medium size] ... [large size]
	MSH06_slickensides_spine_surface_extrusion4_06-22-06.jpg Slickensides (fault-generated grooves) in surface of Spine from Extrusion 4, created as the spine rubbed against the sides of the conduit and vent as it was extruded. The lighter area below the hammer handle is a weather layer of slickensided dacite overlying the main fault-grooved spine surface. Extrusion 4 erupted between December 2004 and April 2005. USGS Photograph taken on June 22, 2006, by John Pallister. [medium size] ... [large size]
April 28, 2006
	MSH06_chopper_heading_to_collect_dome_rocks_04-28-06.jpg Helicopter heading to new growth on Mount St. Helens dome to collect dome rocks. Note the "Jaws" collector hanging underneath the helicopter. USGS Photograph taken on April 28, 2006, by Dan Dzurisin. [medium size] ... [large size]
	MSH06_chopper_collecting_dome_rocks_04-28-06.jpg Helicopter collecting dome rocks. Note the "Jaws" collector hanging underneath the helicopter on face of new growth. USGS Photograph taken on April 28, 2006, by Dan Dzurisin. [medium size] ... [large size]
	MSH06_jaws_collecting_dome_rocks_04-28-06.jpg View from helicopter window at "Jaws" collecting dome rocks. USGS Photograph taken on April 28, 2006, by Steve Schilling. [medium size] ... [large size]
	MSH06_pilot_slinging_with_background_slab_04-28-06.jpg View from inside of the helicopter showing pilot watching his "Jaws" sling, collecting dome rocks. The growing slab on Mount St. Helens' dome is visible through the doorway. USGS Photograph taken on April 28, 2006, by Steve Schilling. [medium size] ... [large size]
February 15, 2006
	MSH06_USGS_scientist_examins_rock_samples_02-15-06.jpg USGS scientist John Pallister examines dome rock samples. USGS Photograph taken on February 15, 2006, by Mike Doukas and Julie Griswold. [medium size] ... [large size]
August 19, 2005
	MSH05_dome_sampling_jawsII_in_action_08-19-05.jpg "Jaws II" sampler "in action", collecting dome rock samples. USGS Photograph taken on August 19, 2005, by Carl Thornber. [medium size] ... [large size]
	MSH05_dome_sampling_jawsII_sampler_08-19-05.jpg "Jaws II" sampler with rock collected. USGS Photograph taken on August 19, 2005, by Tristan Herriott. [medium size] ... [large size]
	MSH05_dome_sampling_jawsII_mesh_08-19-05.jpg "Jaws II" sampler with dome rock samples. USGS Photograph taken on August 19, 2005, by Carl Thornber. [medium size] ... [large size]
	MSH05_dome_sampling_jawsII_rock_collected_08-19-05.jpg "Jaws II" sampler with rock collected. USGS Photograph taken on August 19, 2005, by Tristan Herriott. [medium size] ... [large size]
	MSH05_dome_sampling_jawsII_hot_rock_08-19-05.jpg "Jaws II" sampler with rock collected. USGS Photograph taken on August 19, 2005, by Tristan Herriott. [medium size] ... [large size]
	MSH05_dome_sampling_rock_sample_08-19-05.jpg Sample of dome rock collected by "Jaws II". USGS Photograph taken on August 19, 2005, by Carl Thornber. [medium size] ... [large size]
	MSH05_examining_dome_rock_sample_08-19-05.jpg Examining sample of dome rock collected by "Jaws II". USGS Photograph taken on August 19, 2005, by Steve Schilling. [medium size] ... [large size]
	MSH05_USGS_scientist_with_dome_rock_08-19-05.jpg USGS scientist, Carl Thornber, with dome rock. USGS Photograph taken on August 19, 2005, by Tristan Herriott. [medium size] ... [large size]
July 13, 2005
	MSH05_dome_rock_sampler_at_staging_area_07-13-05.jpg At staging area, sampler to gather dome rocks. USGS Photograph taken on July 13, 2005, by Seth Moran. [medium size] ... [large size]
	MSH05_base_spine_closeup_07-13-05.jpg Base of Mount St. Helens new spine, location headed to sample the dome. USGS Photograph taken on July 13, 2005, by John Pallister. [medium size] ... [large size]
	MSH05_slinging_the_rock_sampler_07-13-05.jpg Slinging the rock sampler above the surface of the spine. USGS Photograph taken on July 13, 2005, by John Pallister. [medium size] ... [large size]
	MSH05_dome_rock_sampler_over_spine_07-13-05.jpg Slinging the rock sampler above the surface of the spine. USGS Photograph taken on July 13, 2005, by John Pallister. [medium size] ... [large size]
	MSH05_gathering_dome_samples_from_spine_07-13-05.jpg Gathering dome rock samples from the surface of the spine. USGS Photograph taken on July 13, 2005, by John Pallister. [medium size] ... [large size]
	MSH05_USGS_scientist_examines_sampler_07-13-05.jpg USGS Scientist examines contents of dome sampler. USGS Photograph taken on July 13, 2005, by John Pallister. [medium size] ... [large size]
	MSH05_dome_rock_closeup_07-13-05.jpg Closeup of dome rock. USGS Photograph taken on July 13, 2005, by John Pallister. [medium size] ... [large size]
February 22, 2005
	MSH05_sampling_dome_with_helicopter_sling_02-22-05.jpg Using helicopter to gather dome samples. USGS Photograph taken on February 22, 2005, by Dan Dzurisin. [medium size] ... [large size]
	MSH05_sampling_dome_rock_02-22-05_animated.gif Animated GIF, sampling for dome rocks, made from USGS photographs taken on February 22, 2005, by Dan Dzurisin. [AnimatedGIF, 785K]
	MSH05_sampling_dome_emptying_box_02-22-05.jpg Emptying the dome sampling box. USGS Photograph taken on February 22, 2005, by Linda Mark. [medium size] ... [large size]
	MSH05_USGS_scientist_checks_dome_samples_02-22-05.jpg U.S. Geological Survey scientists examines dome rock. USGS Photograph taken on February 22, 2005, by Linda Mark. [medium size] ... [large size]
January 3, 2005
	MSH05_dome_sample_getting_ready_01-03-05.jpg Getting ready to collect dome rocks, by John Pallister. USGS Photograph taken on January 3, 2005. [medium size] ... [large size]
	MSH05_dome_sampling_location_from_south_01-03-05.jpg Sampling location (yellow arrow) on Mount St. Helens' dome, viewed from the south. Yellow circle is one of the "spiders", a telemetered monitoring station. USGS Photograph taken on January 3, 2005, by John Pallister. [medium size] ... [large size]
	MSH05_dome_sampling_location_01-03-05.jpg Sampling location (yellow arrow in yellow circle) on Mount St. Helens' dome. USGS Photograph taken on January 3, 2005, by John Pallister. [medium size] ... [large size]
	MSH05_dome_sampling_at_location_01-03-05.jpg Sampling (yellow circle) Mount St. Helens' dome. USGS Photograph taken on January 3, 2005, by John Pallister. [medium size] ... [large size]
	MSH05_dome_sampling2_at_location_01-03-05.jpg Sampling (yellow circle) Mount St. Helens' dome. USGS Photograph taken on January 3, 2005, by John Pallister. [medium size] ... [large size]
	MSH05_dome_sample_slinging_01-03-05.jpg Slinging newly gathered dome rocks. USGS Photograph taken on January 3, 2005, by Steve Schilling. [medium size] ... [large size]
	MSH05_dome_sample_collected_01-03-05.jpg Newly gathered dome rocks. USGS Photograph taken on January 3, 2005, by Steve Schilling. [medium size] ... [large size]
	MSH05_dome_samples_01-03-05.jpg Newly gathered dome rocks. USGS Photograph taken on January 3, 2005. [medium size] ... [large size]
November 4, 2004
	MSH04_USGS_scientists_examine_dome_rocks_11-04-04.jpg USGS scientists examine new rock samples from the new growth on Mount St. Helens' dome. USGS Photograph taken on November 4, 2004, by David Wieprecht. [medium size] ... [large size]
	MSH04_USGS_scientist_examines_dome_rock_11-04-04.jpg USGS scientist Cynthia Gardner examines new rock samples from the new growth on Mount St. Helens' dome. USGS Photograph taken on November 4, 2004, by John Pallister. [medium size] ... [large size]
October 27, 2004
	MSH04_collecting_rock_samples_new_growth_10-27-04.jpg USGS scientist (left of helicopter) collects new rock samples from the new growth on Mount St. Helens' dome. USGS Photograph taken on 27 October 2004, by David Wieprecht. [medium size] ... [large size]
October 20, 2004
	MSH04_rock_sample_collector_10-20-04.jpg Sampling equipment for taking rock samples from the dome. USGS photograph taken on October 20, 2004, by John Pallister. [medium size] ... [large size]
	MSH04_rock_sample_collector_sling_10-20-04.jpg Slinging sampling equipment for taking rock samples from the dome. USGS photograph taken on October 20, 2004, by Steve Schilling. [medium size] ... [large size]
	MSH04_rock_sample_collector_with_sample_10-20-04.jpg Rock samples from the dome. USGS photograph taken on October 20, 2004, by Steve Schilling. [medium size] ... [large size]
	MSH04_rock_samples_from_dome_10-20-04.jpg Rock samples from the dome. USGS photograph taken on October 20, 2004, by Steve Schilling. [medium size] ... [large size]
	MSH04_rock_sample_USGS_scientist_10-20-04.jpg USGS scientist Rick Hobblit examines rock from the dome. USGS photograph taken on October 20, 2004, by Steve Schilling. [medium size] ... [large size]
Dome Rock Thin Sections
Comparing 1986 to 2004
	MSH86_st_helens_rock_sample_dacite_from_1986.jpg 1986 - Augite-Hornblende-Hypersthene Dacite, 63.5 weight % SiO2. Hypersthene is the dominant mafic mineral, with accessory augite Distinctive hornblende reaction rims Large plagioclase phenocrysts with sieve-textured cores common USGS Photograph by Carl Thornber and Mike Clynne. [medium size] ... [large size]
	MSH04_st_helens_rock_sample_dacite_11-04-04.jpg 2004 - Hypersthene-Hornblende Dacite (collected November 4, 2004), 65.3 weight % SiO2. Hornblende is the dominant mafic mineral Hypersthene is smaller and less abundant and augite is not present No significant hornblende reaction rims Lacks large plagioclase phenocrysts with sieve-textured cores USGS Photograph by Carl Thornber and Mike Clynne. [medium size] ... [large size]
	MSH86_st_helens_rock_sample_hornblende_from_1986.jpg 1986 - Hornblende in dome dacite. USGS Photograph by Carl Thornber and Mike Clynne. [medium size] ... [large size]
	MSH04_st_helens_rock_sample_hornblende_11-04-04.jpg 2004 - Hornblende in dome dacite (collected November 4, 2004). USGS Photograph by Carl Thornber and Mike Clynne. [medium size] ... [large size]
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