Tuesday, April 07, 2015

Torres del Paine National Park, Chile

This national park is one of the best I've ever visited! I was first here in 1995 and always enjoy coming back.

This is Montaña Dorotea (Dorothy Mountain) north of Puerto Natales. It is composes of Upper Cretaceous sandstone and shale. The Argentinian border is just beyond the crest and in the 1978 run-up to war with Chile, the area was filled with land mines. They have now been removed. The trip from Punta Arenas to the Park boundary is five hours by bus. This area is about half-way to the park.

We stopped at an exposure of the Upper Cretaceous Cerro Toro Formation for photographs. More on this down in the blog.

The opening to Cueva de Milodon (Cave of the Milodon's) within the Cerro Toro Formation. I have photo's from the inside of the cave farther down in the posting.

Arrival at Rio Serrano just before sunset. This highly meandering stream drains almost the entire landscape within National Park. The clouds are foreboding of the weather we would experience here.

Close-up of the shale lithology of the Cerro Toro Formation. This shale was deposited east of the South American arc about 100 million years ago in the Magallanes basin.

After deposition, the formation was subjected to crustal shortening and intense folding can be observed in some outcrops. Our first full day in the Park saw lots of rain and heavy wind - a normal day for this extreme latitude (about 52º south). As such, there were few photographs on this day, visiting the Gray Lake.

A beautiful sunset awaited us from the picture windows in our rooms in the Rio Serrano Hotel. View to the north of the Cuernos (Horms) de Paine. The orange glow lasted about 10 minutes - and then it was gone beneath more cloud. Note the interior of the massif is light-colored diorite, which intruded the black shale of the Cerro Toro Formation about 12 Ma. The dome-like mass is classified as a laccolith, since the upper carapace was likely not punctured into a volcano.

On our way into the Park on Day 2. Hills in the foreground and middle ground are part of the Cero Toro Formation.

Close-up of the Cuernos in a fresh dusting of snow. Winter comes early here.

 Within the shale are occasional fossils like this Inoceramus.

Salto Grande (Big Waterfall) drains Lake Nordenskold over a lip of resistant Cerro Toro Formation.

We walked in the rain about a mile to get closer to the Cuernos., draped in clouds

The end of the hike on the shore of Lake Nordenskold.

Out local guide Andrea with the tour leader Nick. They were great companions who showed us a good time in spite of the dismal weather. So glad we did this hike!

Our soggy group of Smithsonian travelers are still smiling with the Cuernos de Paine as a backdrop. The rain did let up a bit on the way back.

Wildfires have ravaged much of this park in the last 20 years and the ghosts of the beech trees line the shore of Lake Nordenskold.

Thinly-bedded shale and sandstone comprise most of the western exposures of the Cerro Toro Formation. However, more eastern exposures have thicker conglomerate. What in the world are conglomerates doing in a deep marine basin? There were likely mobilized during earthquakes in the Upper Cretaceous and ran out along the ocean floor to this deep marine basin. You can read a bit more about this here.

Traveling to the east side of the massif, the weather is mostly always much sunnier. The mountains block the eastward movement of the wet rains. And in thrs drier country lives the guanaco, a member of the camel family.

Here the guanaco is king of the Patagonian steppe. Note the layered hills in the distance of the Cretaceous seaway in South America.

Even with a long lens (300 mm) the Andean Condor looks quite small. But these large scavengers are easy to spot as there are hundreds of them in the park.

The Rhea is South America's version of southern flightless birds (the ostrich in Africa and the emu in Australia). They are wary of people and a shot this close is rare.

Another sunlit morning from the hotel of the Cuernos de Paine

On the way out of the park, it was a dismal, rainy day again and so we made an unscheduled stop to walk in the Milodon Cave. The cave is much bigger than it seems from a distance.

Within the cave were found the mummified remains of milodon's (or milodont's). Here is a life-size recreation within the cave entrance. These were giant Ice Age herbivores related to the North American Giant Shasta ground sloth and modern sloths.

Looking deep into the cave some 100 meters. Note the stratigraphic horizon in the left-hand wall of the cave where overlying conglomerate rock rests on the underlying shale. This creates an aquatard in the stratigraphy and the weakening of the sediment cement is what caused the cave to become excavated when the waters of an Ice Age lake lapped onto this horizon.

Nearing Punta Arenas on the highway from Puerto Natales. Drumlins can be seen in the distance. I love driving and hiking across the Patagonian landscape!

Flying over the Andes Mountains from Punta Arenas to Puerto Montt, we could see many glaciated peaks at sunset.

Sunday, April 05, 2015

Cape Horn, Wulaia Bay and Punta Arenas Chile

Better late than never, right! Here a re few pictures from my latest Smithsonian Journey's trip which included a 4-day cruise from Cape Horn to Punta Arenas.

Full moon setting over Cape Horn

A view of Cape Horn - the southernmost piece of land in the America's (note that this view shows land that protrudes to the east - there is actually other land around the corner that is a bit farther south).

Part of the Wollaston Archipelago which includes Cape Horn Island

This is a view of Wulaia Bay and the abandoned meteorological station

This plaque adorns the entrance to the meteorologic station. Charles Darwin landed here in this bap on January 23, 1833. Many of our passengers were thrilled to learn of this and I in turn was thrilled at their joy in it.

Looking out from Wulaia Bay toward Isla Hoste

This is actually a pretty nice day for this part of the world. There was no rain and the visibility was decent.

Our ship, the Stella Australis can be seen within the bay

The next day we traveled to the northwest side of Tierra del Fuego Island. The mountains and glaciers were spectacular.

This is the Aguila Glacier in Agostini Fjord

This photo was taken from the ship but shows the beach we landed on and hiked across to the foot of the glacier

Coming ashore by Zodiac

The sun poked through for a moment while on the beach, highlighting the rugged nature of this island

This is most of the folks in our group at the glacier

Low tide in Agostini Sound

Glacier reflected

Fantastic rocks, formed when an oceanic slab was subducted beneath South America

Loading the Zodiac boats

The Stella Australis in the Straight of Magellan

Gull on Magdalena Island

A different gull on Magdalena Island

Full moon setting over the lighthouse on Magdalena Island

The Straight of Magellan was filled with ice during the last Ice Age and Magdalena Island was shaped a this time. Note the erratic boulder on the beach on the distance.

Colorful Punta Arenas along the Straight of Magellan

Another view of Punta Arenas. From here we would travel to Torres del Paine National Park. See my next posting for pictures of that landscape.