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Javelina Rocks DP021-2013. Posted January 21, 2013; processed Jan. 21. . The location name, Javelina Rocks, describes an outcropping of Catalina gneiss that is frequented by javelinas. The last major turnout on the park's loop drive is at this spot. The gneiss in question formed from granite rather than from sedimentary rock. Bright neon green lichen had colonized many of the surfaces. I don't yet know the geologic history that tipped the layers of rock so steeply at this location. Saguaro National Park, East. Tucson, Arizona December 20, 2012 (mid- to late morning) Many thanks to all who left comments on the euphorbia picture, especially those who looked at both versions and expressed a preference one way or another.
Roses and yarrow blooming at the base of the huge glacial erratic boulder that marks the entrance. Hidden Lake Gardens, Michigan May 29, 2012 (nex5n)
Roses and yarrow blooming at the base of the huge glacial erratic boulder that marks the entrance. Hidden Lake Gardens, Michigan May 29, 2012 (nex5n)
Roses and yarrow blooming at the base of the huge glacial erratic boulder that marks the entrance. In case you're wondering about the white balance in this shot, the boulder really is a pinkish hue as seen here. Hidden Lake Gardens, Michigan May 29, 2012 (nex5n)
FHAA Blake B (Puddingstone?) Detail of polished surface This monument is a monolith of some exotic conglomerate rock. Three sides have been left rough, and the texture is bumpy, reflecting the size of the main inclusions in the rock matrix. The fourth side is sliced vertically and polished, and has the name "F. W. Blake" carved in it, but no dates. In this polished side you can see that most of the inclusions have the same structure, namely a greenish outer rind or coating, and a cream-colored or pinkish interior. I wish some geologist could tell me more about this rock, It's certainly unique to my experience. Forest Hill Cemetery, Ann Arbor, Michigan March 21, 2012
FHAA Blake B (Puddingstone?) Detail of polished surface Like some alien lifeform, swimming under a microscope This monument is a monolith of some exotic conglomerate rock. Three sides have been left rough, and the texture is bumpy, reflecting the size of the main inclusions in the rock matrix. The fourth side is sliced vertically and polished, and has the name "F. W. Blake" carved in it, but no dates. In this polished side you can see that most of the inclusions have the same structure, namely a greenish outer rind or coating, and a cream-colored or pinkish interior. I wish some geologist could tell me more about this rock, It's certainly unique to my experience. Forest Hill Cemetery, Ann Arbor, Michigan March 21, 2012
The large glacial erratic boulder that stands just outside the rail fence at the entrance. Detail of an area of darker mineral than the pinkish granite that predominates. Oddly, bright green lichen seen here in small specks seem to prefer the darker rock. Whether it's a thermal or a chemical preference, I don't know. (You may have to view this in the largest sizes in order to see the lichen, but it's definitely there.) Hidden Lake Gardens, Lenawee County, Michigan March 22, 2012 (nex-5)
The large glacial erratic boulder that stands just outside the rail fence at the entrance. Detail of some fissures in an upper corner of the boulder. Note also that in all the thousands of years of exposure to the weather, lichen have gained only a slim foothold on it. Hidden Lake Gardens, Lenawee County, Michigan March 22, 2012 (nex-5)
The large glacial erratic boulder that stands just outside the rail fence at the entrance. A plaque on a smaller rock at the base of the boulder describes it thusly: "THE BIG ROCK / This large boulder, a coarse granite or pegmatite, was brought down from its outcrop location along the north shore of Georgian Bay Canada by the vast ice sheet which swept in a southwesterly direction over the Great Lakes region many thousands of years ago. / Unlike most of the rocks brought down by the ice it was in it instead of under it and so was protected, except on its under side, from the grinding action of the glacier. / It came to rest above ground as you see it some 25 miles west of this site in Wheatland Township, Hillsdale County, when the ice melted." Hidden Lake Gardens, Lenawee County, Michigan March 22, 2012 (nex-5)
Javelina Rocks

DP021-2013. Posted January 21, 2013; processed Jan. 21.
.
The location name, Javelina Rocks, describes an outcropping of Catalina gneiss that is frequented by javelinas. The last major turnout on the park's loop drive is at this spot. The gneiss in question formed from granite rather than from sedimentary rock. Bright neon green lichen had colonized many of the surfaces. I don't yet know the geologic history that tipped the layers of rock so steeply at this location.
Saguaro National Park, East.
Tucson, Arizona
December 20, 2012 (mid- to late morning)

Many thanks to all who left comments on the euphorbia picture, especially those who looked at both versions and expressed a preference one way or another.
Javelina Rocks DP021-2013. Posted January 21, 2013; processed Jan. 21. . The location name, Javelina Rocks, describes an outcropping of Catalina gneiss that is frequented by javelinas. The last major turnout on the park's loop drive is at this spot. The gneiss in question formed from granite rather than from sedimentary rock. Bright neon green lichen had colonized many of the surfaces. I don't yet know the geologic history that tipped the layers of rock so steeply at this location. Saguaro National Park, East. Tucson, Arizona December 20, 2012 (mid- to late morning) Many thanks to all who left comments on the euphorbia picture, especially those who looked at both versions and expressed a preference one way or another.
Javelina Rocks

DP021-2013. Posted January 21, 2013; processed Jan. 21.
.
The location name, Javelina Rocks, describes an outcropping of Catalina gneiss that is frequented by javelinas. The last major turnout on the park's loop drive is at this spot. The gneiss in question formed from granite rather than from sedimentary rock. Bright neon green lichen had colonized many of the surfaces. I don't yet know the geologic history that tipped the layers of rock so steeply at this location.
Saguaro National Park, East.
Tucson, Arizona
December 20, 2012 (mid- to late morning)

Many thanks to all who left comments on the euphorbia picture, especially those who looked at both versions and expressed a preference one way or another.
See photo in original gallery.
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