Editing Ice core (section)

===  Other inclusions ===
Meteorites and micrometeorites that land on polar ice are sometimes concentrated by local environmental processes.  For example, there are places in Antarctica where winds evaporate surface ice, concentrating the solids that are left behind, including meteorites.  Meltwater ponds can also contain meteorites.  At the [[South Pole Station]], ice in a well is melted to provide a water supply, leaving micrometeorites behind. These have been collected by a robotic "vacuum cleaner" and examined, leading to improved estimates of their flux and mass distribution.<ref>{{harvnb|Alley|2000}}, p. 73.</ref> The well is not an ice core, but the age of the ice that was melted is known, so the age of the recovered particles can be determined. The well becomes about 10 m deeper each year, so micrometeorites collected in a given year are about 100 years older than those from the previous year.<ref>{{cite report |last1=Taylor|first1=Susan |last2=Lever |first2=James H. |last3=Harvey |first3=Ralph P. |last4=Govoni |first4=John|date=May 1997 |title=Collecting micrometeorites from the South Pole Water Well|url=http://apps.dtic.mil/dtic/tr/fulltext/u2/a327829.pdf |archive-url=https://web.archive.org/web/20171011080819/http://www.dtic.mil/dtic/tr/fulltext/u2/a327829.pdf |url-status=live |archive-date=11 October 2017 |publisher=Cold Regions Research and Engineering Lab, Hanover, NH |pages=1–2 |docket=97–1 |access-date=14 September 2017 }}</ref> [[Pollen]], an important component of sediment cores, can also be found in ice cores.  It provides information on changes in vegetation.<ref>{{cite journal|last1=Reese|first1=C.A.|last2=Liu|first2=K.B.|last3=Thompson|first3=L.G.|title=An ice-core pollen record showing vegetation response to Late-glacial and Holocene climate changes at Nevado Sajama, Bolivia|journal=Annals of Glaciology|date=26 July 2017|volume=54|issue=63|page=183|doi=10.3189/2013AoG63A375|doi-access=free}}</ref>