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Does anyone know the impact of Parallax scrolling from a SEO prospective?

Thanks Nakul, agreed.

Assume this situation for a second...

Let's say you place a rel= canonical tag on a page and point to the original/authentic URL. Now, let's say that that original/authentic URL is also populated into your XML sitemap...

So, here's my question...

Since you can't actually navigate to that original/authentic URL (it still loads with a 200, it's just not actually linkded to from within the site itself), does that create an issue for search engines?

Last consideration...

The bots can still access those pages via the canonical tag and the XML sitemap, it's just that the user wouldn't be able to access those original/authentic pages in their natural site navigation.

Thanks,

Rodrigo

Thanks John- good response. I think the biggest takeaway for me is to know that none of the "dis-order" above will actually cause errors in the file. However, I completely agree with your recommendations as to where the sitemap: should go, and why the allow parameter is unnecessary.

Last question, do you know if the blank line in-between the allow: and second disallow: parameter cause any issues?

side note for those using the robots.txt to block content, also consider the noindex,follow attribute in the META tag as an alternative to save some link value that those pages may be getting.