@article{fdi:010054223,
  title = {{T}he {C}olonia structure, {S}ao {P}aulo, {B}razil},
  author = {{R}iccomini, {C}. and {C}rosta, {A}. {P}. and {P}rado, {R}. {L}. and {L}edru, {M}arie-{P}ierre and {T}urcq, {B}runo and {S}ant'anna, {L}. {G}. and {F}errari, {J}. {A}. and {R}eimold, {W}. {U}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he near-circular {C}olonia structure, located in the southern suburbs of the megacity of {S}ao {P}aulo, {B}razil, has attracted the attention of geoscientists for several decades due to its anomalous character and the complete absence of any plausible endogenous geologic explanation for its formation. {O}rigin by impact cratering has been suggested repeatedly since the 1960s, but no direct evidence for this has been presented to date. {N}ew seismic data have been recently acquired at {C}olonia, providing new insights into the characteristics and possible layering of infill of the structure, as well as into the depth to the underlying basement. {W}e review the current knowledge about the {C}olonia structure, present the new seismic data, and discuss the existing-as yet still indirect-evidence for a possible origin by an impact. {T}he new data suggest the existence of a sedimentary fill of approximately 275 m thickness and also the presence of two intermediate zones between sediment and basement: an upper zone that is approximately 65 m thick and can be interpreted as a possible crater-fill breccia, whereas the other zone possibly represents fractured/brecciated basement, with a thickness of approximately 50 m. {A}lthough this depth to basement seems to be inconsistent with the expected geometry of a simple, bowl-shape impact structure of such diameter, there are a number of still unconstrained parameters that could explain this, such as projectile nature, size and velocity, impact angle, and particularly the current erosion depth.},
  keywords = {},
  booktitle = {},
  journal = {{M}eteoritics and {P}lanetary {S}cience},
  volume = {46},
  numero = {11},
  pages = {1630--1639},
  ISSN = {1086-9379},
  year = {2011},
  DOI = {10.1111/j.1945-5100.2011.01252.x},
  URL = {https://www.documentation.ird.fr/hor/fdi:010054223},
}