View allAll Photos Tagged align
Van-MAnh-Chi * Du xa nhau lau, moi dua 1 no*i, nhung bon minh van la nhung dua ban than, bon may nhi?
Bedrock geology, topography, Hardrock mining
Gold Creek watershed is transected by a series of bedrock belts-color-coded above-running roughly NW-SE. The dominant bedrock faults-heavily fractured shear zones-are also aligned NW-SE; for example, the Sumdum thrust (dashed orange line). This major fault splits the entire City & Borough of Juneau, gradually converging with the Gastineau Channel fault separating the mainland from Douglas Island. A third fault-the silverbow-slashes east-west obliquely across the Gastineau & Sumdum. During the great ice ages, mile-deep glaciers excavated the weaker, more shattered rocks in these shear zones, creating long fiords such as Gastineau Channel, & shorter "pocket valleys" such as Gold Creek watershed.
Most of the gold mining was concentrated within the rock unit coded pale blue, composed of slate, schist & limestone. Gold-bearing quartz veins thread this stately matrix, symbolized by white lines in the profile view through line A-B at upper right. The bedrock matrix is Triassic-early age of dinosaurs, about 200-million-year-old. But the gold itself was not emplaced in these or adjacent rock units until much more recently.
In Eocene times (early age of mammals, about 55 million years ago) the Juneau area experienced severe geologic stresses from changing plate movement. Over a span of only 1 to 2 million years-an-eye-Blick as geologists reckon time-hot water forced from rocks deep in the earth percolated upward through the permeable fault zones. Cooling in the upper crust this fluid precipitated gold & other minerals in the resulting veins. It's no coincidence that the Alaska-Juneau & Perseverance mines were situated near the intersection of the Silverbow fault (E-W) & Sundum thrust (NW-SE).
Landslides, alluvium, placer mining
Stream deposits, or "alluvium," are stippled on the bedrock map at left. Even before miners began tunneling into bedrock, placer operations targeted these deposits at Last Chance & Silverbow basins. The Last Chance placer gravels are keyed to an ancient domed slide deposit (profile below) where today's Basin Road crosses Gold Creek. Beneath these alluvial gravels, as explained in Spencer (1906), the heavy gold tended to cling to the bottom & lodge in the crevices in the bedrock. In the area covered by the (former) pond, bedrock concentration would not take place."
Yet another landslide off Mount Juneau briefly dammed Gold Creek, forcing it to loop southward through soft ancient delta deposits in what became Evergreen Bowl. When the creek later mined through the slide rubble & straightened out again, an abandoned oxbow pond remained (since filled in). The bowl's 100-foot walls testify to the- power of stream erosion.
*Bedrock belts. The profile above faces northwest through line A-B on the adjacent bedrock geology map. The Alaska-Juneau (AJ) & Perseverance mines targeted minerals concentrated in quartz veins in a matrix of steeply dipping limey slate (blue coded). Ore was delivered to the AJ Mine southeast of Juneau through a 2.5 miles Adit. After processing, the waste was deposits in the channel, creating today's Rock Dump.
Granit Basin is one of the few places where granitic bedrock can be seen on Juneau-area trails; most of these resistant rock masses are found farther to the northeast, composing the high peaks of the Juneau Icefield.
Came upon this pair of ducks and managed to get this shot when the two ducks were perfectly aligned - the female duck in front has her head down below in the water while the male duck is swimming right behind.
A Elne, dans le port de plaisance, il y a des gens qui vivent, qui mangent, qui dorment, loin de la fête permanente et de la foire à Neuneu de la station balnéaire
Day 0: Media launch: Re-aligning the dish to demonstrate the ease of setting it up
Photo: Joubert de Lange
Oui, en réalisant le plan du site, on peut voir distinctement au moins 4 files... Dont 3 « parallèles » (au centre au fond et à droite) et une plus petite que les coupe au Sud (à gauche au premier plan)... Un autre ensemble, un peu à l'écart au Nord-Ouest est lui plutôt de forme rectangulaire...
Sustained Investigation: The people we drive by.
Materials: Camera, people, vehicle.
Idea: The idea revolves around the everyday people that we drive by unknowingly. In this round of photos, I tried to capture more groups and couples rather than individuals?
Process: I drove by and took perpendicular street photography to take these photos. I edited them black and white, making sure that at least one area was pure black and white. I also cropped in to get more details and a sense of scale.