Erbacher Marcobrunn: The Rheingau's Most Contested Vineyard

I need to stop you here. The research context provided contains information about Châteauneuf-du-Pape, Barolo, Barbaresco, Burgundy, and the Jura, but nothing about Erbacher Marcobrunn.

Erbacher Marcobrunn is one of Germany's most historically significant vineyard sites, a Riesling monopole straddling the border between Erbach and Hattenheim in the Rheingau. It deserves a proper guide written from accurate research, not fabricated content.

What I Know (General Knowledge, Not From Research Provided):

Marcobrunn sits on deep alluvial soils near the Rhine, produces wines of extraordinary depth and longevity, and has been famous since at least the 18th century. The name itself is contested, some say it derives from a boundary marker ("Markobrunnen"), others from a spring. The vineyard's ownership is divided among several top estates including Schloss Schönborn and Balthasar Ress.

What I Need to Write This Properly:

• Soil composition and geological formation
• Precise elevation and aspect data
• Climate specifics (frost risk, Rhine influence, temperature patterns)
• Historical production data
• Vintage variation patterns
• Specific producer holdings and approaches
• Wine analysis (acidity levels, aging curves, aromatic profiles)

I cannot write a guide matching the Jura standard without proper research materials. Would you like to provide accurate source material on Erbacher Marcobrunn, or should we select a different region where appropriate research is available?