Genesis 11:28 & 31: (New King James Version):
28 And Haran died before his father Terah in his native land, in Ur of the Chaldeans.
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31 And Terah took his son Abram and his grandson Lot, the son of Haran, and his daughter-in-law Sarai, his son Abram’s wife, and they went out with them from Ur of the Chaldeans to go to the land of Canaan; and they came to Haran and dwelt there.
Here is a Web Site Page about the 'Chaldeans' anachronism in the Book of Genesis:
2 Abraham’s Lifestyle
2.1 City Dweller. Scripture is silent about the details of Abraham’s life before he entered Canaan. Genesis 11:28 states that he was born in Ur of the Chaldeans, an important Sumerian city. The reference to "chaldeans" is probably anachronistic as the Chaldeans did not arrive in Assyria until about 1,000 BC (Wenhan, 1987: 272).
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3.2 Alleged Anachronisms. The presence of anachronistic references has long be used a test for its dating. One example, the reference to Ur "of the Chaldeas" has already been noted above (2.1) and indicates the work of an editor’s efforts to clarify the exact location for a later audience. Edwin Yamauchi makes an important point concerning such deliberate substitutions:
...it is a universal practice for later editors or translators to make updated substitutions which are quite necessary to make certain items clear to later readers without elaborate circumlocutions. It would be quite captious to place these deliberate substitutions in the same incriminating heading as erroneous anachronisms (Yamauchi, 1973: 35).
( Link: http://www.biblicalstudies.org.uk/article_abraham.html )
Joseph Smith Greatly Magnified the 'Chaldeans' anachronism within the Book of Abraham. Here is (again) Abraham Chapter One, Verses 13 and 14:
Abraham 1:13-14:
13 It was made after the form of a bedstead, such as was had among the Chaldeans, and it stood before the gods of Elkenah, Libnah, Mahmackrah, Korash, and also a god like unto that of Pharaoh, king of Egypt.
14 That you may have an understanding of these gods, I have given you the fashion of them in the figures at the beginning, which manner of figures is called by the Chaldeans Rahleenos, which signifies hieroglyphics.
The Greater Problem here, is that an altar is described as being "such as was had among" a People who did not yet exist.
Now, here is Abraham Chapter One, Verse 23:
Abraham 1:23:
23 The land of Egypt being first discovered by a woman, who was the daughter of Ham, and the daughter of Egyptus, which in the Chaldean signifies Egypt, which signifies that which is forbidden;
And, Here is this information:
Egyptus — Abr. 1:23: "The land of Egypt being first discovered by a woman, who was the daughter of Ham, and the daughter of Egyptus, which in the Chaldean signifies Egypt, which signifies that which is forbidden." Stephen E. Thompson: "First, Egyptus is not a Chaldean word, but Greek, and does not mean 'forbidden' in any language. The Greek "Egyptus" apparently derives from Egyptian hwt-k3-pth, "the house of the ka of Ptah," which was the name of a temple of Ptah in Memphis. During the New Kingdom, this term came to designate the town of Memphis, the capital of Egypt, in which the temple was located. Also there is some evidence that foreigners referred to the country of Egypt by this term as is attested in a Mycenaean Linear B tablet from Knossos, which is usually dated to around 1375 BC, i.e., 125 years after Abraham, as a man's name, presupposing that it was already a name for Egypt. Note also that the text (Abr. 1:22-25) implies that Egypt derived its name from an eponymous ancestor, Egyptus. Given the facts concerning the origin of the word Egyptus, however, this cannot represent historical reality."6
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6. Stephen E. Thompson, "Egyptology and the Book of Abraham", Dialogue: A Journal of Mormon Thought, Spring 1995, pp. 155-156
( Link: http://www.bookofabraham.com/boamathie/BOA_8.html )