Question: During construction of the Tampa Bypass Canal there was an accidental breach of a thick sequence of what?

Context paragraphs:
Obvodny Canal: Obvodny Canal (Russian: Обводный канал , lit.  Bypass Canal) is the longest canal in Saint Petersburg, Russia, which in the 19th century served as the southern limit of the city.  It is 8 km long and flows from the Neva River near Alexander Nevsky Lavra to the Yekaterinhofka not far from the sea port.  The canal was dug in 1769–80 and 1805–33.  By the late 19th century, after to the Industrial Revolution, it had effectively become a sewer collecting wastewater of adjacent industrial enterprises.  Eventually the canal became shallow and no longer navigable.  The banks of the canal are lined with granite.

Tampa Bypass Canal: The Tampa Bypass Canal and Palm River are a 14 mi flood bypass operated by the Southwest Florida Water Management District.  The canal includes several concrete flood control structures and was constructed during the 1960s and 1970s.  Its purpose is to redirect flood waters from large amounts of rainfall from the Hillsborough River to Tampa Bay to prevent floodwaters reaching homes and businesses.  Despite its original purpose it is now used as a drinking water source for the City of Tampa.  During construction of the canal the Floridan aquifer was accidentally breached.

Belozersky Canal: The Belozersky Bypass Canal (Russian: Белозерский канал, Белозерский обводной канал ) is a canal around the south-western part of Lake Beloye in Belozersky District of Vologda Oblast in north-western Russia.  It connects Kovzha River to Sheksna River, and is part of the Volga–Baltic Waterway.  The length of the canal is 66.8 km .  The canal passes the town of Belozersk.

Permian Basin (Europe): The European Permian Basin is a thick sequence of sedimentary rocks deposited in a large sedimentary basin during the Permian period in North Europe.  The basin underlies northern Poland, northern Germany, Denmark, the Netherlands and under a significant portion of the North Sea to Scotland.  A major natural gas discovery was made in the Rotliegend Formation at Slochteren, Netherlands in 1959.  The Rotliegend is the lower portion of the Permian sequence and consists of over 600 m of sandstones and evaporites.  It is overlain by 1000 m thick sequence of evaporites known as the Zechstein Formation.

McKay Bay: McKay Bay is the name given to the northeastern corner of Tampa Bay, a body of water in Tampa, Florida.  The McKay Bay Greenway runs through the area on the east side of McKay Bay and connects to the Tampa Bypass Canal.  McKay Bay Nature Park is located at 685 North 34th Street in Tampa.  The area also includes the McKay Bay Resource Recovery Plant, a power plant fueled with refuse.  The lake was man-made and was once used as a cooling pond for a city incinerator.  McKay Bay is at the northeast corner of Hillsborough Bay, which is the name given to the portion of Tampa Bay on the east side of Tampa's Interbay Peninsula.

Elbe Lateral Canal: The Elbe Lateral Canal, or the Elbe-Seitenkanal in German (   ), is a 115 km long canal in Lower Saxony, Germany.  It runs from the Elbe near Lauenburg/Elbe to the Mittelland Canal near Gifhorn.  It forms an important transport connection between southern and northern Germany, and it provides a bypass of a section of the Elbe with limited navigability.  At the construction start it was also thought as a bypass outside the GDR, considered politically unreliable.

Floridan aquifer: The Floridan aquifer system, composed of the Upper and Lower Floridan aquifers, is a thick sequence of Paleogene carbonate rock which spans an area of about in the southeastern United States.  It underlies the entire state of Florida and parts of Alabama, Georgia, Mississippi, and South Carolina.

Burgh Bypass: Burgh Bypass is a bypass of the town of Burgh Le Marsh near Skegness.  It was passed in 2005 and construction began in September 2006 after a lengthy campaign from locals.  The bypass is aiming to cut traffic dramatically by re-routing vehicles past the town and over the village of Orby coming out on Burgh Road, the main road to Skegness.  The bypass was originally expected to be finished in Winter 2007/Spring 2008, on 26 July 2007 the roundabout on the bypass was opened and opening of the bypass took place on 13 October 2007.  In early November half of the bypass was opened with limited access to Ingoldmells and Common Lane.  The bypass fully opened to traffic on 30 November 2007.

Vodootvodny Canal: Vodootvodny Canal (Russian: Водоотводный канал, "water bypass canal" ) is a 4 kilometre long, 30-60 metre wide canal in downtown Moscow, Russia.  It was built in the 1780s on the old riverbed of the Moskva River to control floods and support shipping.  Canal construction created an island, Balchug, between the Moskva River and the canal.  The island acquired its present shape in 1938 with the completion of Moscow Canal megaproject.  The canal is spanned by ten bridges; the eleventh is now under construction.

Grampian Group: The Grampian Group is an estimated 9,000 m thick sequence of metamorphosed Neoproterozoic sedimentary rocks that outcrop across the Central Highlands of Scotland, east of the Great Glen.  It forms a part of the Dalradian Supergroup.  The sequence thickness at any one place is limited to 5km.

Supporting paragraphs: Tampa Bypass Canal Floridan aquifer
Answer: Paleogene carbonate rock