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Project Acronym: CBAY | State: Completed | Expedition ID: 5001
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... (?TBD)
- (inserted: 08.12.2005 23:00)
ChesapeakeBay: 2005-12-09 ˇ
This is the last Daily Message for the Chesapeake ...
This is the last Daily Message for the Chesapeake Bay Impact Crater Drilling Project. The close-down of the drill site proceeded rapidly during December 6-9. All of the drilling equipment was removed from the site before noon on December 9. Trailers, dumpsters, and other ancillary equipment will be removed during the week of December 12. We thank all of you for your interest in this project. - (inserted: 03.12.2005 23:00)
ChesapeakeBay: 2005-12-04 ˇ
Coring ended at about 8:00 a.m., local time, on ...
Coring ended at about 8:00 a.m., local time, on December 4 at a final depth of 5,795 ft (1.1 miles, 1.77 km). Geophysical logging began soon after the end of coring. - (inserted: 30.11.2005 23:00)
ChesapeakeBay: 2005-12-01 ˇ
The drill bit moved below 5,675 ft (1,730 m) ...
The drill bit moved below 5,675 ft (1,730 m) on December 1. The decision has been made to finish coring and start geophysical logging on Sunday, December 4. - (inserted: 28.11.2005 23:00)
ChesapeakeBay: 2005-11-29 ˇ
Coring continued below 5,600 ft (1,707 m) on November
Coring continued below 5,600 ft (1,707 m) on November 29. - (inserted: 26.11.2005 23:00)
ChesapeakeBay: 2005-11-27 ˇ
The drill bit passed below 5,500 ft (1,676 m) ...
The drill bit passed below 5,500 ft (1,676 m) during the afternoon of November 27. We are recovering variably deformed schist and pegmatite. - (inserted: 22.11.2005 23:00)
ChesapeakeBay: 2005-11-23 ˇ
The drill bit passed below the mile mark (5,280 ...
The drill bit passed below the mile mark (5,280 ft, 1,609 m) in the early afternoon of November 23 as coring continued in lithic breccia and larger lithic clasts. Additional drilling funds have been received by the Project from ICDP, USGS, and the Solar System Division of the NASA Science Mission Directorate. Coring is now expected to continue into the early days of December. - (inserted: 18.11.2005 23:00)
ChesapeakeBay: 2005-11-19 ˇ
At present, we are drilling below a depth of ...
At present, we are drilling below a depth of 5150 m (1570 m) in a clast of quartz-rich mica schist within suevite or lithic breccia. - (inserted: 16.11.2005 23:00)
ChesapeakeBay: 2005-11-17 ˇ
Still recovering suevite below a depth of 5000 ft.
Still recovering suevite below a depth of 5000 ft. (1524 m) on November 17. - (inserted: 14.11.2005 23:00)
ChesapeakeBay: 2005-11-15 ˇ
We are continuing to recover suevite below a depth
We are continuing to recover suevite below a depth of 4,825 ft (1,471 m) on November 15. - (inserted: 12.11.2005 23:00)
ChesapeakeBay: 2005-11-13 ˇ
The corehole section has become increasingly interesting, as we ...
The corehole section has become increasingly interesting, as we are now drilling in suevite below a depth of about 1.4 km. - (inserted: 10.11.2005 23:00)
ChesapeakeBay: 2005-11-11 ˇ
Some theories were confirmed as the drill bit passed ...
Some theories were confirmed as the drill bit passed through the bottom of the thick granite section and back into Exmore-style sediment breccia. - (inserted: 07.11.2005 23:00)
ChesapeakeBay: 2005-11-08 ˇ
Core drilling continued below a depth of 4,320 ft
Core drilling continued below a depth of 4,320 ft (1,317 m) on November 8. - (inserted: 05.11.2005 23:00)
ChesapeakeBay: 2005-11-06 ˇ
The drill bit passed a depth of 4,200 ft ...
The drill bit passed a depth of 4,200 ft (1,280 m) during the late afternoon of November 6, still in granite. - (inserted: 01.11.2005 23:00)
ChesapeakeBay: 2005-11-02 ˇ
The drill bit was approaching a depth of 4,000
The drill bit was approaching a depth of 4,000 ft (1,219 m) in the early evening of November 2. - (inserted: 30.10.2005 23:00)
ChesapeakeBay: 2005-10-31 ˇ
Coring in the granite continued during October 31, reaching ...
Coring in the granite continued during October 31, reaching a depth of 3,861 ft (1,177 m) during the late afternoon. - (inserted: 29.10.2005 22:00)
ChesapeakeBay: 2005-10-30 ˇ
NQ coring in the granite continued over the weekend. ...
NQ coring in the granite continued over the weekend. The fractured character of the rock caused several minor problems that limited progress. - (inserted: 26.10.2005 22:00)
ChesapeakeBay: 2005-10-27 ˇ
The drill bit reached a granitic rock at a ...
The drill bit reached a granitic rock at a depth of about 3,600 ft (1,100 m) in the early morning of October 26. The drillers have switched to an NQ bit and rods with the HQ rods now serving as casing. - (inserted: 24.10.2005 22:00)
ChesapeakeBay: 2005-10-25 ˇ
The drill bit reached a depth of 3,550 ft ...
The drill bit reached a depth of 3,550 ft (1,082 m) during the late afternoon of October 25, still in sedimentary breccias. - (inserted: 21.10.2005 22:00)
ChesapeakeBay: 2005-10-22 ˇ
Coring is continuing in sediment breccias. The drill bit ...
Coring is continuing in sediment breccias. The drill bit reached a depth of 3,300 ft (1,006 m) during the evening of October 22. - (inserted: 19.10.2005 22:00)
ChesapeakeBay: 2005-10-20 ˇ
Finally, the drill bit passed below the previous bottom ...
Finally, the drill bit passed below the previous bottom of the hole at 3,087 ft (941 m). The bit reached a depth of 3,101 ft (945 m) during the evening on October 20. - (inserted: 17.10.2005 22:00)
ChesapeakeBay: 2005-10-18 ˇ
The drill bit passed below a depth of 2,900 ...
The drill bit passed below a depth of 2,900 ft (884 m) during the early evening of October 18. Several days ago, the bit deviated from the original hole near a depth of 2,400 ft (732 m). We have been collecting ?bonus? cores below that depth in the second - (inserted: 15.10.2005 22:00)
ChesapeakeBay: 2005-10-16 ˇ
We continued moving down toward the previously drilled bottom ...
We continued moving down toward the previously drilled bottom of the corehole, reaching below a depth of 2,700 ft (823 m) late in the day on October 16. - (inserted: 13.10.2005 22:00)
ChesapeakeBay: 2005-10-14 ˇ
We are continuing our efforts to return to the ...
We are continuing our efforts to return to the bottom of the corehole at a depth of 3,087 ft (941 m). Progress has been steady but very slow during the past three days. - (inserted: 10.10.2005 22:00)
ChesapeakeBay: 2005-10-11 ˇ
Drilling problems have continued in the lower part of ...
Drilling problems have continued in the lower part of the Exmore breccia through October 11. Blocks of Cretaceous red clay continue to slide or expand into the drill hole, requiring repeated reaming in the same intervals, repeated loss of mud circulation, and an inability to return to the bottom of the hole. A new drilling strategy will be determined in the coming days to address these problems. - (inserted: 08.10.2005 22:00)
ChesapeakeBay: 2005-10-09 ˇ
Coring continued on October 8 to a depth of ...
Coring continued on October 8 to a depth of 3,087 ft (941 m) until mud circulation was lost during the early evening. Efforts to restore the mud flow by pulling the rods and reaming problem intervals continued to midnight on October 9. - (inserted: 06.10.2005 22:00)
ChesapeakeBay: 2005-10-07 ˇ
The drill rods were pulled from the hole at ...
The drill rods were pulled from the hole at mid-day on October 6, and a new drill bit and reaming shell were installed. The drill hole was reamed as the rods were replaced in the hole, and coring during did not resume until the early morning hours of October 7. The coring bit passed a depth of 3,000 ft (914 m) at midnight on October 7. - (inserted: 04.10.2005 22:00)
ChesapeakeBay: 2005-10-05 ˇ
Coring continued today below a depth of 2,850 ft
Coring continued today below a depth of 2,850 ft (869 m). - (inserted: 03.10.2005 22:00)
ChesapeakeBay: 2005-10-04 ˇ
Coring continued in the sediment-clast breccia below a depth ...
Coring continued in the sediment-clast breccia below a depth of 2,700 ft (823 m). The Eyreville corehole is now the deepest test hole in the Chesapeake Bay impact crater. - (inserted: 02.10.2005 22:00)
ChesapeakeBay: 2005-10-03 ˇ
Coring continued on October 2 and 3. The drill ...
Coring continued on October 2 and 3. The drill bit penetrated below a depth of 2,600 ft (792 m) before midnight on October 3. - (inserted: 30.09.2005 22:00)
ChesapeakeBay: 2005-10-01 ˇ
Coring resumed in the late afternoon of October 1
Coring resumed in the late afternoon of October 1 after the completion of reaming. - (inserted: 29.09.2005 22:00)
ChesapeakeBay: 2005-09-30 ˇ
Reaming of the corehole continues. Sad to say there's
Reaming of the corehole continues. Sad to say there's no core today. - (inserted: 28.09.2005 22:00)
ChesapeakeBay: 2005-09-29 ˇ
A reaming shell was added to the drill string ...
A reaming shell was added to the drill string to increase the diameter of the drill hole. Reaming was in progress at the end of the day. - (inserted: 27.09.2005 22:00)
ChesapeakeBay: 2005-09-28 ˇ
The drill bit was approaching a depth of 2,350
The drill bit was approaching a depth of 2,350 ft (716 m) near the end of the day. - (inserted: 26.09.2005 22:00)
ChesapeakeBay: 2005-09-27 ˇ
The drill string was pulled from the hole to ...
The drill string was pulled from the hole to investigate the reason for slow drilling during the past several days. The HQ bit proved to be badly worn (see photograph) and was replaced. The drilling rate significantly improved with the new bit. - (inserted: 24.09.2005 22:00)
ChesapeakeBay: 2005-09-25 ˇ
Dusk falls on the Eyreville deep core drill tower ...
Dusk falls on the Eyreville deep core drill tower as the core bit pushes deeper into the impact breccia and reaches 2075-ft into the earth. - (inserted: 23.09.2005 22:00)
ChesapeakeBay: 2005-09-24 ˇ
Coring with the HQ rods and sampling system began
Coring with the HQ rods and sampling system began today in the late morning. - (inserted: 22.09.2005 22:00)
ChesapeakeBay: 2005-09-23 ˇ
During the afternoon of September 23, the PQ-size drill ...
During the afternoon of September 23, the PQ-size drill string became stuck in the hole following the loss of mud circulation due to mud collars on the drilling rods. We are addressing this problem by using the PQ rods as casing and proceeding with the smaller HQ rods and sampling system. - (inserted: 21.09.2005 22:00)
ChesapeakeBay: 2005-09-22 ˇ
We are continuing to make good progress in coring ...
We are continuing to make good progress in coring the Exmore breccia within the upper part of the crater section. Coring reached a depth of 1,850 ft (564 m) in the late evening of September 22nd. - (inserted: 20.09.2005 22:00)
ChesapeakeBay: 2005-09-21 ˇ
We are continuing to core the Exmore sediment-clast breccia ...
We are continuing to core the Exmore sediment-clast breccia near a depth of 1,700 ft (518 m) during the late evening of September 21st. - (inserted: 19.09.2005 22:00)
ChesapeakeBay: 2005-09-20 ˇ
The drill bit penetrated the top of the crater ...
The drill bit penetrated the top of the crater impactite section during the late afternoon of 20 September 2005. Since then, we have been drilling in the sediment-clast breccias of the Exmore breccia. The drill bit penetrated below a depth of 1,500 ft (457 m) during the late evening of September 20. - (inserted: 18.09.2005 22:00)
ChesapeakeBay: 2005-09-19 ˇ
The drilling rate has slowed somewhat within the upper ...
The drilling rate has slowed somewhat within the upper Eocene Chickahominy Formation; however progress and core recovery remain very good. We have reached a depth of about 1,350 ft (411 m) at about 1830 hours, local time, on September 19. - (inserted: 17.09.2005 22:00)
ChesapeakeBay: 2005-09-18 ˇ
We have reached a depth of 1,148.3 ft within ...
We have reached a depth of 1,148.3 ft within post- impact lower Miocene or Oligocene sediments as of 1:00 pm local time on September 18. Core recovery has been excellent. - (inserted: 16.09.2005 22:00)
ChesapeakeBay: 2005-09-17 ˇ
Coring is continuing in the post-impact Miocene sedimentary section ...
Coring is continuing in the post-impact Miocene sedimentary section with excellent recovery. We are at a depth of about 245 m as of 1600 hours local time. - (inserted: 14.09.2005 22:00)
ChesapeakeBay: 2005-09-15 ˇ
The drilling of the ICDP-USGS deep corehole into the ...
The drilling of the ICDP-USGS deep corehole into the Chesapeake Bay impact crater began during the afternoon of September 15. Coring began at about 420 ft depth in post-impact upper Miocene sediments.