Matto-Grosso Girl, a Mixture of Portuguese, Indian and Negro Blood.
Brazilian Child, a Mixture of Portuguese and Negro.
After leaving the cuvette we began to ascend the Estivado Range, very steep and rocky. Near the summit we struggled through a field of great igneous boulders, chiefly upright pillars of granite and white marble. Upon the pass (elev. 1,400 ft.) was a circular depression some 300 metres in diameter, perfectly flat-bottomed and grassy. It was surrounded by cones from 80 to 100 ft. high. On the south-east side of the range—very steep—was abundant rock, whereas to the north-west side was a padding of brown earth on a gentle incline divided into terraces. Here and there pointed noses of volcanic blocks, similar to those we had found on the opposite side of the range, showed through. We went across a depression where water dripping down the mountain-side had remained stagnant, rendering that spot almost impassable. The animals sank chest-deep into slush, crashing through the thick and much-entangled growth of live and fallen bamboos.
More campos, fairly wide, were found beyond this, and great stretches of foliated slate and sandstone in strata turned over into a vertical position, and quantities of débris. Then again we cut our way through a cool growth of bamboos, handsome palmeiras and akuri palms; after which we emerged into campos once more, rising gradually to an elevation of 1,550 ft. upon an undulating terrace of the second section of the Estivado range.
Pulling and pushing the mules and horses over a lot of boulders and up a steep incline, we reached the highest point of the range on our route—1,800 ft. above the sea level. Again the stratification of red and grey rock in layers from 6 ins. to 1 ft. thick, standing vertically, showed what a geological commotion there must have been in those regions. The summit of the range, extending from north to south, appeared like the teeth of a saw, so broken up was it into repeated undulations. On the west side of the range we found a gentle slope of clear campos with merely a few stunted trees upon them.
Before us to the west stood high the level sky-line of a table-land, showing perfectly straight parallel strata of rock extending all along its face, but slightly undulated near the summit of the range. Otherwise its grassy slopes were quite undisturbed in their virgin smoothness.
In the distance to the north of our course was a great lagoon—the Lagõa dos Veados, "Lagoon of the Deer"—a most important point in South America, for it was there that the great Arinos (Tapajoz) River rose. The lagoon—3 kil. long and less than 1 kil. wide—had no visible outlet, but some hundreds of metres away a spring came out of the earth, forming the Rio Preto (Black River). The Rio Preto, soon joined by the Rio Novo which we had seen descending from the Serra Azul, formed the Arinos River and could certainly be considered the head-waters of that immense tributary of the Amazon.