They are formed when they split from the edges of ice shelves, and are often rectangular in shape when they break off. The nearly flawless 90-degree angles of this slab of ice may puzzle many people, making them think that this geometrical shape was deliberately carved with a big chainsaw.
A chunk of the deteriorating Antarctic Larsen C ice shelf, it seems to have calved very recently, based on its very clean edges - the sea and wind haven't yet been to work eroding them.
NASA asserts that the iceberg's precise angles and extremely flat surface, "indicate that it probably recently calved from the ice shelf". "And then you have what are called "tabular icebergs"," she said.
"My guess is that A68 will continue rotating as it is now around that western point, until what is currently the northern edge collides with the Larsen C ice front". By contrast, iceberg A68's surface area measured some 2,240 square miles at the time of calving.
Draft Trump Admin Memo Narrowly Defines Gender, Uses Genetic Testing
By Sunday evening, a rally for transgender rights took place in NY ; another took place Monday in Washington. The policy would rescind previous policy which eased trans recognition.
Chelsea "angry and deeply embarrassed" over touchline incident involving Jose Mourinho
Despite Mourinho's acceptance of Ianni's apology, England's women's team manager Neville said Chelsea should sack the Italian. The assistant has already come to me and apologised, I told him to forget it.
Trump Vows to Outspend Russia, China on Nuclear Arsenal Buildup
The agreement, signed by the United States and USSR, banned ground-launched nuclear missiles with ranges of 500km to 5,500km. Kremlin spokesman Dmitry Peskov called Trump's withdrawal plan a matter of deep concern for Moscow .
Not satisfied with blowing our minds once, NASA released an image on Monday showing a second rectangular iceberg.
IceBridge's senior support scientist Jeremy Harbeck spotted the iceberg floating just off the Larsen C ice shelf.
"This one came from the crumbling Larsen C ice shelf on the Antarctic Peninsula".
Scientists are concerned about how ice at Earth's poles will fare with warming temperatures, and how melting ice will affect sea levels around the world, but Bartholomaus is hesitant to draw direct links to climate change.
Sea ice comes in many types and forms, depending on the stage of development and the meteorological, atmospheric, and other physical conditions.