Occurrence of Attributes in Original Text
The text related to the cultural heritage 'Pre-Hispanic City of Teotihuacan' has mentioned 'Tunnel' in the following places:
| Occurrence Sentence | Text Source |
|---|---|
| During the installation of a "sound and light" show in 1971, workers discovered the entrance to a tunnel and cave system underneath the Pyramid of the Sun. | WIKI |
| [74] Although scholars long thought this to be a natural cave, more recent examinations have established the tunnel was entirely manmade. | WIKI |
| In late 2003 a tunnel beneath the Temple of the Feathered Serpent was accidentally discovered by Sergio Gxc3xb3mez Chxc3xa1vez and Julie Gazzola, archeologists of the National Institute of Anthropology and History (INAH). | WIKI |
| At the bottom he came to rest in apparently ancient construction xe2x80x93 a man-made tunnel, blocked in both directions by immense stones. | WIKI |
| Gxc3xb3mez was aware that archeologists had previously discovered a narrow tunnel underneath the Pyramid of the Sun, and supposed he was now observing a kind of similar mirror tunnel, leading to a subterranean chamber beneath Temple of the Feathered Serpent. | WIKI |
| Researchers reported that the tunnel was believed to have been sealed in 200 CE. | WIKI |
| Before the start of excavations, beginning in the early months of 2004, Dr. Victor Manuel Velasco Herrera, from UNAM Institute of Geophysics, determined with the help of ground-penetrating radar (GPR) and a team of some 20 archeologists and workers the approximate length of the tunnel and the presence of internal chambers. | WIKI |
| The archeologists explored the tunnel with a remote-controlled robot called Tlaloc II-TC, equipped with an infrared camera and a laser scanner that generates 3D visualization to perform three dimensional register of the spaces beneath the temple. | WIKI |
| A small opening in the tunnel wall was made and the scanner captured the first images, 37 meters into the passage. | WIKI |
| By the end of 2009 archeologists of the INAH located the entrance to the tunnel that leads to galleries under the pyramid, where remains of rulers of the ancient city might have been deposited. | WIKI |
| In August 2010 Gxc3xb3mez Chxc3xa1vez, now director of Tlalocan Project: Underground Road, announced that INAH's investigation of the tunnel xe2x80x93 closed nearly 1,800 years ago by Teotihuacan dwellers xe2x80x93 will proceed. | WIKI |
| The INAH team, consisted of about 30 people supported with national and international advisors at the highest scientific levels, intended to enter the tunnel in Septemberxe2x80x93October 2010. | WIKI |
| The hole that had appeared during the 2003 storms was not the actual entrance; a vertical shaft of almost 5 meters by side is the access to the tunnel. | WIKI |
| After archeologists broke ground at the entrance of the tunnel, a staircase and ladders that would allow easy access to the subterranean site were installed. | WIKI |
| Nearly 1,000 tons of soil and debris were removed from the tunnel. | WIKI |
| One of the most remarkable findings in the tunnel chambers was a miniature mountainous landscape, 17 meters underground, with tiny pools of liquid mercury representing lakes. | WIKI |
| [77][78][84] The walls and ceiling of the tunnel were found to have been carefully impregnated with mineral powder composed of magnetite, pyrite (fool's gold), and hematite to provide a glittering brightness to the complex, and to create the effect of standing under the stars as a peculiar re-creation of the underworld. | WIKI |