Tin Bider crater

{{Short description|Impact crater in Algeria}}

{{Infobox terrestrial impact site

| name = Tin Bider crater

| other_name =

| photo = Tin Bider.jpg

| photo_size =

| photo_alt =

| photo_caption = Landsat image of the Tin Bider crater; screen capture from NASA World Wind

| map = Algeria

| map_alt =

| map_caption = Location of the crater in Algeria

| map_size =

| location = Tinrhert Plateau

| label =

| label_position =

| coordinates = {{Coord|27|36|7|N|5|6|44|E|type:landmark_region:DZ|display=inline,title}}

| coordinates_ref =

| confidence = Confirmed

| diameter = {{convert|6|km|mi|abbr=on}}

| depth =

| rise =

| imp_size =

| age = <70 Ma
<Late Cretaceous

| exposed = Yes

| drilled = No

| bolide =

| translation =

| language =

| pronunciation =

| topo =

| access =

| country = Algeria

| state = Tamanrasset Province

| province =

| district =

| municipality =

}}

Tin Bider ({{langx|ar|تين بيدر}}) is an impact crater that sits in dry, rugged terrain in Algeria.{{Cite Earth Impact DB | name = Tin Bider| linkname = tinbider| accessdate = 2009-08-16}}{{cite web

|title=Tin Bider Crater, Algeria

|date=19 December 2010

|publisher=NASA

|url=http://earthobservatory.nasa.gov/IOTD/view.php?id=47939

}} The crater was formed in the last 70 million years, perhaps in the late Cretaceous or early Tertiary Period. Spanning 6 kilometres, the crater sits at the southern end of a range of hills. The elevated position and concentric rings of Tin Bider suggest that its structure is complex.

Massive sandstones attributable to the Lower Cretaceous, known throughout the Sahara, are only exposed in the craters centre, about 500 meters above its usual stratigraphic position.

Because of the large prominence of ductile deformation, Tin Bider significantly differs from other craters. While there is yet no conclusive explanation for this unique condition, Tin Bider could provide important information toward a better understanding of large-scale impact cratering.

Tin Bider Crater, Algeria.jpg|Natural-colour satellite image of Tin Bider Crater

Tin-bider overview.png|Schematic map of Tin Bider impact structure

Cross-section of Tin Bider impact structure.png|Cross-section of Tin Bider impact structure