Q. When citing a government website in GSA format - without listed authors - how did I do an in-text citation?

When there is no author listed for your source you just start with next available piece of information required, such as title of page or website (or book, article, etc.).

In text citations are supposed to refer your reader to your reference list at the end of your paper, so you have to create that first, then grab the brief info you need from it to create your in text citation.

You use the first piece of information for your source that's list on your reference list and the year published. Here is an example with no author:

Reference List

1994, Roxana silt of the Upper Mississippi Valley:

Lithology, source, and paleoenvironment: Geological Society of

America Bulletin, v. 106, p. 430–442

In Text Citation

(Roxana silt of the Upper Mississippi Valley, 1994)