Global Boundary Stratotype Section and Point at Klonk, Czech Republic

Target entity: Global Boundary Stratotype Section and Point at Klonk, Czech Republic
Context triple: [Early Devonian, boundaryDefinedBy, Global Boundary Stratotype Section and Point at Klonk, Czech Republic]

• A. International Chronostratigraphic Chart
  The International Chronostratigraphic Chart is the globally recognized standard timeline used by geologists to define and correlate the divisions of Earth’s geological history.
• B. On the Imperfection of the Geological Record
  "On the Imperfection of the Geological Record" is a chapter in Charles Darwin's *On the Origin of Species* that addresses why the fossil record is incomplete and how this affects evidence for evolutionary change.
• C. Eocene–Oligocene climate transition
  The Eocene–Oligocene climate transition was a major global cooling event around 34 million years ago that marked the shift from a greenhouse to an icehouse Earth, including the formation of large Antarctic ice sheets.
• D. Solnhofen Limestone
  Solnhofen Limestone is a famous Late Jurassic lithographic limestone formation in Bavaria, Germany, renowned for its exceptionally well-preserved fossils, including the iconic Archaeopteryx.
• E. Limits of Oceans and Seas
  Limits of Oceans and Seas is an authoritative reference work that defines and standardizes the official boundaries and names of the world's oceans and seas for international use.
• F. None of above. chosen
• G. Unsure - the case is ambiguous/there is not enough information to decide.

Target entity: Global Boundary Stratotype Section and Point at Klonk, Czech Republic
Target entity description: The Global Boundary Stratotype Section and Point at Klonk in the Czech Republic is a formally designated geological reference site that marks the internationally agreed base of the Devonian System and serves as a key standard for correlating Early Devonian rock strata worldwide.

• A. International Chronostratigraphic Chart
  The International Chronostratigraphic Chart is the globally recognized standard timeline used by geologists to define and correlate the divisions of Earth’s geological history.
• B. On the Imperfection of the Geological Record
  "On the Imperfection of the Geological Record" is a chapter in Charles Darwin's *On the Origin of Species* that addresses why the fossil record is incomplete and how this affects evidence for evolutionary change.
• C. Eocene–Oligocene climate transition
  The Eocene–Oligocene climate transition was a major global cooling event around 34 million years ago that marked the shift from a greenhouse to an icehouse Earth, including the formation of large Antarctic ice sheets.
• D. Solnhofen Limestone
  Solnhofen Limestone is a famous Late Jurassic lithographic limestone formation in Bavaria, Germany, renowned for its exceptionally well-preserved fossils, including the iconic Archaeopteryx.
• E. Limits of Oceans and Seas
  Limits of Oceans and Seas is an authoritative reference work that defines and standardizes the official boundaries and names of the world's oceans and seas for international use.
• F. None of above. chosen